121351264278 has 32 divisors (see below), whose sum is σ = 246498101376. Its totient is φ = 39819947328.

The previous prime is 121351264267. The next prime is 121351264283. The reversal of 121351264278 is 872462153121.

It is a super-2 number, since 2×121351264278² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 35800 + ... + 493947.

It is an arithmetic number, because the mean of its divisors is an integer number (7703065668).

Almost surely, 2^121351264278 is an apocalyptic number.

121351264278 is an abundant number, since it is smaller than the sum of its proper divisors (125146837098).

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

121351264278 is a wasteful number, since it uses less digits than its factorization.

121351264278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530348.

The product of its digits is 161280, while the sum is 42.

The spelling of 121351264278 in words is "one hundred twenty-one billion, three hundred fifty-one million, two hundred sixty-four thousand, two hundred seventy-eight".