20121010021212 has 96 divisors (see below), whose sum is σ = 48073050783744. Its totient is φ = 6547180147200.

The previous prime is 20121010021193. The next prime is 20121010021219. The reversal of 20121010021212 is 21212001012102.

It is a junction number, because it is equal to n+sod(n) for n = 20121010021191 and 20121010021200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121010021219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1489004568 + ... + 1489018080.

It is an arithmetic number, because the mean of its divisors is an integer number (500760945664).

Almost surely, 2^{20121010021212} is an apocalyptic number.

It is an amenable number.

20121010021212 is an abundant number, since it is smaller than the sum of its proper divisors (27952040762532).

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

20121010021212 is a wasteful number, since it uses less digits than its factorization.

20121010021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20259 (or 20257 counting only the distinct ones).

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

Adding to 20121010021212 its reverse (21212001012102), we get a palindrome (41333011033314).

The spelling of 20121010021212 in words is "twenty trillion, one hundred twenty-one billion, ten million, twenty-one thousand, two hundred twelve".