20121012211212 has 36 divisors (see below), whose sum is σ = 55485215492616. Its totient is φ = 6097276427520.

The previous prime is 20121012211123. The next prime is 20121012211247. The reversal of 20121012211212 is 21211221012102.

20121012211212 is a `hidden beast` number, since 20 + 1 + 210 + 1 + 221 + 1 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25405318053 + ... + 25405318844.

It is an arithmetic number, because the mean of its divisors is an integer number (1541255985906).

Almost surely, 2^{20121012211212} is an apocalyptic number.

20121012211212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20121012211212 is an abundant number, since it is smaller than the sum of its proper divisors (35364203281404).

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

20121012211212 is a wasteful number, since it uses less digits than its factorization.

20121012211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50810636918 (or 50810636913 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20121012211212 its reverse (21211221012102), we get a palindrome (41332233223314).

The spelling of 20121012211212 in words is "twenty trillion, one hundred twenty-one billion, twelve million, two hundred eleven thousand, two hundred twelve".