21102120012212 has 24 divisors (see below), whose sum is σ = 36938483452416. Its totient is φ = 10548267978528.

The previous prime is 21102120012151. The next prime is 21102120012217. The reversal of 21102120012212 is 21221002120112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102120012217) 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, 269233853 + ... + 269312219.

It is an arithmetic number, because the mean of its divisors is an integer number (1539103477184).

Almost surely, 2^{21102120012212} is an apocalyptic number.

It is an amenable number.

21102120012212 is a deficient number, since it is larger than the sum of its proper divisors (15836363440204).

21102120012212 is a wasteful number, since it uses less digits than its factorization.

21102120012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95327 (or 95325 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21102120012212 its reverse (21221002120112), we get a palindrome (42323122132324).

The spelling of 21102120012212 in words is "twenty-one trillion, one hundred two billion, one hundred twenty million, twelve thousand, two hundred twelve".