21012133121012 has 96 divisors (see below), whose sum is σ = 41391143797248. Its totient is φ = 9250536960000.

The previous prime is 21012133120919. The next prime is 21012133121029.

21012133121012 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137299928 + ... + 137452880.

It is an arithmetic number, because the mean of its divisors is an integer number (431157747888).

Almost surely, 2^{21012133121012} is an apocalyptic number.

21012133121012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21012133121012 is a deficient number, since it is larger than the sum of its proper divisors (20379010676236).

21012133121012 is a wasteful number, since it uses less digits than its factorization.

21012133121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153561 (or 153559 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

It can be divided in two parts, 2101213 and 3121012, that added together give a palindrome (5222225).

The spelling of 21012133121012 in words is "twenty-one trillion, twelve billion, one hundred thirty-three million, one hundred twenty-one thousand, twelve".