21121021001022 has 64 divisors (see below), whose sum is σ = 44121976404480. Its totient is φ = 6727623056000.

The previous prime is 21121021001011. The next prime is 21121021001089. The reversal of 21121021001022 is 22010012012112.

It is a super-2 number, since 2×21121021001022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121021000992 and 21121021001010.

It is a congruent number.

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, 613591372 + ... + 613625792.

It is an arithmetic number, because the mean of its divisors is an integer number (689405881320).

Almost surely, 2^{21121021001022} is an apocalyptic number.

21121021001022 is an abundant number, since it is smaller than the sum of its proper divisors (23000955403458).

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

21121021001022 is a wasteful number, since it uses less digits than its factorization.

21121021001022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38689.

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

Adding to 21121021001022 its reverse (22010012012112), we get a palindrome (43131033013134).

The spelling of 21121021001022 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-one million, one thousand, twenty-two".