121858284040 has 16 divisors (see below), whose sum is σ = 274181139180. Its totient is φ = 48743313600.

The previous prime is 121858283977. The next prime is 121858284061. The reversal of 121858284040 is 40482858121.

It can be written as a sum of positive squares in 2 ways, for example, as 117195306244 + 4662977796 = 342338^2 + 68286^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523228511 + ... + 1523228590.

Almost surely, 2^121858284040 is an apocalyptic number.

121858284040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121858284040 is an abundant number, since it is smaller than the sum of its proper divisors (152322855140).

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

121858284040 is a wasteful number, since it uses less digits than its factorization.

121858284040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046457112 (or 3046457108 counting only the distinct ones).

The product of its (nonzero) digits is 163840, while the sum is 43.

The spelling of 121858284040 in words is "one hundred twenty-one billion, eight hundred fifty-eight million, two hundred eighty-four thousand, forty".