21010120012212 has 48 divisors (see below), whose sum is σ = 49139911793280. Its totient is φ = 6986762284032.

The previous prime is 21010120012157. The next prime is 21010120012307. The reversal of 21010120012212 is 21221002101012.

It is a junction number, because it is equal to n+sod(n) for n = 21010120012191 and 21010120012200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57433788 + ... + 57798444.

It is an arithmetic number, because the mean of its divisors is an integer number (1023748162360).

Almost surely, 2^{21010120012212} is an apocalyptic number.

It is an amenable number.

21010120012212 is an abundant number, since it is smaller than the sum of its proper divisors (28129791781068).

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

21010120012212 is a wasteful number, since it uses less digits than its factorization.

21010120012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376040 (or 376038 counting only the distinct ones).

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

Adding to 21010120012212 its reverse (21221002101012), we get a palindrome (42231122113224).

The spelling of 21010120012212 in words is "twenty-one trillion, ten billion, one hundred twenty million, twelve thousand, two hundred twelve".