122191685811988 has 24 divisors (see below), whose sum is σ = 230546912944712. Its totient is φ = 56331856888704.

The previous prime is 122191685811959. The next prime is 122191685811989. The reversal of 122191685811988 is 889118586191221.

It can be written as a sum of positive squares in 4 ways, for example, as 17011318772484 + 105180367039504 = 4124478^2 + 10255748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122191685811989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1339657995 + ... + 1339749202.

Almost surely, 2^{122191685811988} is an apocalyptic number.

It is an amenable number.

122191685811988 is a deficient number, since it is larger than the sum of its proper divisors (108355227132724).

122191685811988 is a wasteful number, since it uses less digits than its factorization.

122191685811988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679408091 (or 2679408089 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 70.

The spelling of 122191685811988 in words is "one hundred twenty-two trillion, one hundred ninety-one billion, six hundred eighty-five million, eight hundred eleven thousand, nine hundred eighty-eight".