21121201022 has 16 divisors (see below), whose sum is σ = 32225569200. Its totient is φ = 10379420160.

The previous prime is 21121201009. The next prime is 21121201099. The reversal of 21121201022 is 22010212112.

It is a super-2 number, since 2×21121201022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121200988 and 21121201006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641072 + ... + 673212.

It is an arithmetic number, because the mean of its divisors is an integer number (2014098075).

Almost surely, 2^21121201022 is an apocalyptic number.

21121201022 is a deficient number, since it is larger than the sum of its proper divisors (11104368178).

21121201022 is a wasteful number, since it uses less digits than its factorization.

21121201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37771.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21121201022 its reverse (22010212112), we get a palindrome (43131413134).

The spelling of 21121201022 in words is "twenty-one billion, one hundred twenty-one million, two hundred one thousand, twenty-two".