21122010102012 has 12 divisors (see below), whose sum is σ = 49284690238056. Its totient is φ = 7040670034000.

The previous prime is 21122010101989. The next prime is 21122010102019. The reversal of 21122010102012 is 21020101022112.

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

It is a super-2 number, since 2×21122010102012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122010101982 and 21122010102000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122010102019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880083754239 + ... + 880083754262.

It is an arithmetic number, because the mean of its divisors is an integer number (4107057519838).

Almost surely, 2^{21122010102012} is an apocalyptic number.

It is an amenable number.

21122010102012 is an abundant number, since it is smaller than the sum of its proper divisors (28162680136044).

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

21122010102012 is a wasteful number, since it uses less digits than its factorization.

21122010102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760167508508 (or 1760167508506 counting only the distinct ones).

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

Adding to 21122010102012 its reverse (21020101022112), we get a palindrome (42142111124124).

The spelling of 21122010102012 in words is "twenty-one trillion, one hundred twenty-two billion, ten million, one hundred two thousand, twelve".