201101222202021 has 24 divisors (see below), whose sum is σ = 298890589243896. Its totient is φ = 130235550806400.

The previous prime is 201101222201989. The next prime is 201101222202029. The reversal of 201101222202021 is 120202222101102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66268228680900 + 134832993521121 = 8140530^2 + 11611761^2 .

It is not a de Polignac number, because 201101222202021 - 2⁵ = 201101222201989 is a prime.

It is a super-2 number, since 2×201101222202021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201101222201985 and 201101222202003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201101222202029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2087060010 + ... + 2087156363.

It is an arithmetic number, because the mean of its divisors is an integer number (12453774551829).

Almost surely, 2^{201101222202021} is an apocalyptic number.

It is an amenable number.

201101222202021 is a deficient number, since it is larger than the sum of its proper divisors (97789367041875).

201101222202021 is a wasteful number, since it uses less digits than its factorization.

201101222202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174216533 (or 4174216530 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201101222202021 its reverse (120202222101102), we get a palindrome (321303444303123).

The spelling of 201101222202021 in words is "two hundred one trillion, one hundred one billion, two hundred twenty-two million, two hundred two thousand, twenty-one".