101221597889394 has 32 divisors (see below), whose sum is σ = 204289447127040. Its totient is φ = 33433480870272.

The previous prime is 101221597889281. The next prime is 101221597889431. The reversal of 101221597889394 is 493988795122101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81482889 + ... + 82715804.

It is an arithmetic number, because the mean of its divisors is an integer number (6384045222720).

Almost surely, 2^{101221597889394} is an apocalyptic number.

101221597889394 is an abundant number, since it is smaller than the sum of its proper divisors (103067849237646).

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

101221597889394 is a wasteful number, since it uses less digits than its factorization.

101221597889394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164199634.

The product of its (nonzero) digits is 78382080, while the sum is 69.

The spelling of 101221597889394 in words is "one hundred one trillion, two hundred twenty-one billion, five hundred ninety-seven million, eight hundred eighty-nine thousand, three hundred ninety-four".