1221271121882 has 16 divisors (see below), whose sum is σ = 2097803256000. Its totient is φ = 522353004768.

The previous prime is 1221271121737. The next prime is 1221271121897. The reversal of 1221271121882 is 2881211721221.

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, 87401483 + ... + 87415454.

It is an arithmetic number, because the mean of its divisors is an integer number (131112703500).

Almost surely, 2^{1221271121882} is an apocalyptic number.

1221271121882 is a deficient number, since it is larger than the sum of its proper divisors (876532134118).

1221271121882 is a wasteful number, since it uses less digits than its factorization.

1221271121882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174817445.

The product of its digits is 14336, while the sum is 38.

The spelling of 1221271121882 in words is "one trillion, two hundred twenty-one billion, two hundred seventy-one million, one hundred twenty-one thousand, eight hundred eighty-two".