20012121011212 has 48 divisors (see below), whose sum is σ = 38480461437600. Its totient is φ = 9030883276800.

The previous prime is 20012121011209. The next prime is 20012121011219. The reversal of 20012121011212 is 21211012121002.

It is not an unprimeable number, because it can be changed into a prime (20012121011219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12466762 + ... + 13980142.

It is an arithmetic number, because the mean of its divisors is an integer number (801676279950).

Almost surely, 2^{20012121011212} is an apocalyptic number.

20012121011212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20012121011212 is a deficient number, since it is larger than the sum of its proper divisors (18468340426388).

20012121011212 is a wasteful number, since it uses less digits than its factorization.

20012121011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515562 (or 1515560 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20012121011212 its reverse (21211012121002), we get a palindrome (41223133132214).

The spelling of 20012121011212 in words is "twenty trillion, twelve billion, one hundred twenty-one million, eleven thousand, two hundred twelve".