21011020120022 has 24 divisors (see below), whose sum is σ = 32947168998744. Its totient is φ = 10048511664224.

The previous prime is 21011020119977. The next prime is 21011020120043. The reversal of 21011020120022 is 22002102011012.

It is a junction number, because it is equal to n+sod(n) for n = 21011020119979 and 21011020120006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49645418 + ... + 50066850.

It is an arithmetic number, because the mean of its divisors is an integer number (1372798708281).

Almost surely, 2^{21011020120022} is an apocalyptic number.

21011020120022 is a deficient number, since it is larger than the sum of its proper divisors (11936148878722).

21011020120022 is a wasteful number, since it uses less digits than its factorization.

21011020120022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468604 (or 468581 counting only the distinct ones).

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

Adding to 21011020120022 its reverse (22002102011012), we get a palindrome (43013122131034).

The spelling of 21011020120022 in words is "twenty-one trillion, eleven billion, twenty million, one hundred twenty thousand, twenty-two".