21102210021012 has 24 divisors (see below), whose sum is σ = 49295944553856. Its totient is φ = 7025862220608.

The previous prime is 21102210021001. The next prime is 21102210021019. The reversal of 21102210021012 is 21012001220112.

It is a super-3 number, since 3×21102210021012³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21102210020982 and 21102210021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102210021019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025962588 + ... + 1025983155.

It is an arithmetic number, because the mean of its divisors is an integer number (2053997689744).

Almost surely, 2^{21102210021012} is an apocalyptic number.

It is an amenable number.

21102210021012 is an abundant number, since it is smaller than the sum of its proper divisors (28193734532844).

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

21102210021012 is a wasteful number, since it uses less digits than its factorization.

21102210021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2051946607 (or 2051946605 counting only the distinct ones).

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

Adding to 21102210021012 its reverse (21012001220112), we get a palindrome (42114211241124).

The spelling of 21102210021012 in words is "twenty-one trillion, one hundred two billion, two hundred ten million, twenty-one thousand, twelve".