21001121120022 has 32 divisors (see below), whose sum is σ = 43185457373184. Its totient is φ = 6804431265600.

The previous prime is 21001121119991. The next prime is 21001121120129. The reversal of 21001121120022 is 22002112110012.

It is a junction number, because it is equal to n+sod(n) for n = 21001121119983 and 21001121120010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157443318 + ... + 157576649.

It is an arithmetic number, because the mean of its divisors is an integer number (1349545542912).

Almost surely, 2^{21001121120022} is an apocalyptic number.

21001121120022 is an abundant number, since it is smaller than the sum of its proper divisors (22184336253162).

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

21001121120022 is a wasteful number, since it uses less digits than its factorization.

21001121120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315020284.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21001121120022 its reverse (22002112110012), we get a palindrome (43003233230034).

The spelling of 21001121120022 in words is "twenty-one trillion, one billion, one hundred twenty-one million, one hundred twenty thousand, twenty-two".