21121201222032 has 160 divisors (see below), whose sum is σ = 57929785113600. Its totient is φ = 6608259661824.

The previous prime is 21121201222019. The next prime is 21121201222081. The reversal of 21121201222032 is 23022210212112.

It is a super-2 number, since 2×21121201222032² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 652335828 + ... + 652368204.

It is an arithmetic number, because the mean of its divisors is an integer number (362061156960).

Almost surely, 2^{21121201222032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21121201222032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28964892556800).

21121201222032 is an abundant number, since it is smaller than the sum of its proper divisors (36808583891568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121201222032 is a wasteful number, since it uses less digits than its factorization.

21121201222032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34553 (or 34547 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21121201222032 its reverse (23022210212112), we get a palindrome (44143411434144).

The spelling of 21121201222032 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, thirty-two".