21120102001212 has 24 divisors (see below), whose sum is σ = 49639947773136. Its totient is φ = 6988646890368.

The previous prime is 21120102001183. The next prime is 21120102001259. The reversal of 21120102001212 is 21210020102112.

It is a junction number, because it is equal to n+sod(n) for n = 21120102001191 and 21120102001200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6423387043 + ... + 6423390330.

It is an arithmetic number, because the mean of its divisors is an integer number (2068331157214).

Almost surely, 2^{21120102001212} is an apocalyptic number.

It is an amenable number.

21120102001212 is an abundant number, since it is smaller than the sum of its proper divisors (28519845771924).

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

21120102001212 is a wasteful number, since it uses less digits than its factorization.

21120102001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12846777517 (or 12846777515 counting only the distinct ones).

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

Adding to 21120102001212 its reverse (21210020102112), we get a palindrome (42330122103324).

The spelling of 21120102001212 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, one thousand, two hundred twelve".