221121120201101 has 4 divisors (see below), whose sum is σ = 221250506463900. Its totient is φ = 220991733938304.

The previous prime is 221121120201061. The next prime is 221121120201131. The reversal of 221121120201101 is 101102021121122.

221121120201101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67814006225476 + 153307113975625 = 8234926^2 + 12381725^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121120201101 - 2¹⁰ = 221121120200077 is a prime.

It is a super-2 number, since 2×221121120201101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221121120201101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221121120201131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64693128836 + ... + 64693132253.

It is an arithmetic number, because the mean of its divisors is an integer number (55312626615975).

Almost surely, 2^{221121120201101} is an apocalyptic number.

It is an amenable number.

221121120201101 is a deficient number, since it is larger than the sum of its proper divisors (129386262799).

221121120201101 is a wasteful number, since it uses less digits than its factorization.

221121120201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129386262798.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221121120201101 its reverse (101102021121122), we get a palindrome (322223141322223).

The spelling of 221121120201101 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred one thousand, one hundred one".