221201311101 has 4 divisors (see below), whose sum is σ = 294935081472. Its totient is φ = 147467540732.

The previous prime is 221201311087. The next prime is 221201311117. The reversal of 221201311101 is 101113102122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221201311101 - 2¹³ = 221201302909 is a prime.

It is a super-5 number, since 5×221201311101⁵ (a number of 58 digits) contains 55555 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221201311801) 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, 36866885181 + ... + 36866885186.

It is an arithmetic number, because the mean of its divisors is an integer number (73733770368).

Almost surely, 2^221201311101 is an apocalyptic number.

It is an amenable number.

221201311101 is a deficient number, since it is larger than the sum of its proper divisors (73733770371).

221201311101 is an equidigital number, since it uses as much as digits as its factorization.

221201311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73733770370.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 221201311101 its reverse (101113102122), we get a palindrome (322314413223).

The spelling of 221201311101 in words is "two hundred twenty-one billion, two hundred one million, three hundred eleven thousand, one hundred one".