21202011021012 has 12 divisors (see below), whose sum is σ = 49471359049056. Its totient is φ = 7067337007000.

The previous prime is 21202011021007. The next prime is 21202011021073. The reversal of 21202011021012 is 21012011020212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21202011021012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21202011020982 and 21202011021000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 883417125864 + ... + 883417125887.

It is an arithmetic number, because the mean of its divisors is an integer number (4122613254088).

Almost surely, 2^{21202011021012} is an apocalyptic number.

It is an amenable number.

21202011021012 is an abundant number, since it is smaller than the sum of its proper divisors (28269348028044).

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

21202011021012 is a wasteful number, since it uses less digits than its factorization.

21202011021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766834251758 (or 1766834251756 counting only the distinct ones).

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

Adding to 21202011021012 its reverse (21012011020212), we get a palindrome (42214022041224).

The spelling of 21202011021012 in words is "twenty-one trillion, two hundred two billion, eleven million, twenty-one thousand, twelve".