20122221112012 has 24 divisors (see below), whose sum is σ = 35263937360736. Its totient is φ = 10046817101568.

The previous prime is 20122221111997. The next prime is 20122221112031. The reversal of 20122221112012 is 21021112222102.

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, 11278468 + ... + 12940180.

It is an arithmetic number, because the mean of its divisors is an integer number (1469330723364).

Almost surely, 2^{20122221112012} is an apocalyptic number.

It is an amenable number.

20122221112012 is a deficient number, since it is larger than the sum of its proper divisors (15141716248724).

20122221112012 is a wasteful number, since it uses less digits than its factorization.

20122221112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666017 (or 1666015 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20122221112012 its reverse (21021112222102), we get a palindrome (41143333334114).

The spelling of 20122221112012 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, twelve".