121612269842 has 18 divisors (see below), whose sum is σ = 212207025447. Its totient is φ = 52118064684.

The previous prime is 121612269799. The next prime is 121612269851. The reversal of 121612269842 is 248962216121.

It can be written as a sum of positive squares in only one way, i.e., 60806134921 + 60806134921 = 246589^2 + 246589^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=246589.

It is a super-2 number, since 2×121612269842² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121612269793 and 121612269802.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3434633 + ... + 3469859.

Almost surely, 2^121612269842 is an apocalyptic number.

121612269842 is a deficient number, since it is larger than the sum of its proper divisors (90594755605).

121612269842 is an frugal number, since it uses more digits than its factorization.

121612269842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70470 (or 35236 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The spelling of 121612269842 in words is "one hundred twenty-one billion, six hundred twelve million, two hundred sixty-nine thousand, eight hundred forty-two".