221001000201101 has 4 divisors (see below), whose sum is σ = 221128525303932. Its totient is φ = 220873475098272.

The previous prime is 221001000201019. The next prime is 221001000201109. The reversal of 221001000201101 is 101102000100122.

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 180813337489225 + 40187662711876 = 13446685^2 + 6339374^2 .

It is a cyclic number.

It is not a de Polignac number, because 221001000201101 - 2²² = 221000996006797 is a prime.

It is a super-2 number, since 2×221001000201101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001000201109) 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, 63762548816 + ... + 63762552281.

It is an arithmetic number, because the mean of its divisors is an integer number (55282131325983).

Almost surely, 2^{221001000201101} is an apocalyptic number.

It is an amenable number.

221001000201101 is a deficient number, since it is larger than the sum of its proper divisors (127525102831).

221001000201101 is a wasteful number, since it uses less digits than its factorization.

221001000201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127525102830.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221001000201101 its reverse (101102000100122), we get a palindrome (322103000301223).

The spelling of 221001000201101 in words is "two hundred twenty-one trillion, one billion, two hundred one thousand, one hundred one".