21022112121010 has 192 divisors, whose sum is σ = 51216950405376. Its totient is φ = 6045228034560.

The previous prime is 21022112120969. The next prime is 21022112121011. The reversal of 21022112121010 is 1012121122012.

It is not an unprimeable number, because it can be changed into a prime (21022112121011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 219841869 + ... + 219937471.

It is an arithmetic number, because the mean of its divisors is an integer number (266754950028).

Almost surely, 2^{21022112121010} is an apocalyptic number.

21022112121010 is an abundant number, since it is smaller than the sum of its proper divisors (30194838284366).

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

21022112121010 is a wasteful number, since it uses less digits than its factorization.

21022112121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97649 (or 97638 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21022112121010 its reverse (1012121122012), we get a palindrome (22034233243022).

The spelling of 21022112121010 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, ten".