21211001201022 has 64 divisors (see below), whose sum is σ = 44139916154880. Its totient is φ = 6786930052224.

The previous prime is 21211001201009. The next prime is 21211001201081. The reversal of 21211001201022 is 22010210011212.

It is a junction number, because it is equal to n+sod(n) for n = 21211001200992 and 21211001201010.

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, 29012053 + ... + 29734175.

It is an arithmetic number, because the mean of its divisors is an integer number (689686189920).

Almost surely, 2^{21211001201022} is an apocalyptic number.

21211001201022 is an abundant number, since it is smaller than the sum of its proper divisors (22928914953858).

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

21211001201022 is a wasteful number, since it uses less digits than its factorization.

21211001201022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723137.

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

Adding to 21211001201022 its reverse (22010210011212), we get a palindrome (43221211212234).

The spelling of 21211001201022 in words is "twenty-one trillion, two hundred eleven billion, one million, two hundred one thousand, twenty-two".