122897912642 has 6 divisors (see below), whose sum is σ = 184347612633. Its totient is φ = 61448708432.

The previous prime is 122897912633. The next prime is 122897912663. The reversal of 122897912642 is 246219798221.

It can be written as a sum of positive squares in 2 ways, for example, as 118577611201 + 4320301441 = 344351^2 + 65729^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247889.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 371834 + ... + 619722.

Almost surely, 2^122897912642 is an apocalyptic number.

122897912642 is a deficient number, since it is larger than the sum of its proper divisors (61449699991).

122897912642 is an frugal number, since it uses more digits than its factorization.

122897912642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495780 (or 247891 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The spelling of 122897912642 in words is "one hundred twenty-two billion, eight hundred ninety-seven million, nine hundred twelve thousand, six hundred forty-two".