121392666917420 has 48 divisors (see below), whose sum is σ = 261887777141088. Its totient is φ = 47231482475520.

The previous prime is 121392666917323. The next prime is 121392666917429. The reversal of 121392666917420 is 24719666293121.

It is a super-2 number, since 2×121392666917420² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121392666917420.

It is not an unprimeable number, because it can be changed into a prime (121392666917429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20326397 + ... + 25611476.

It is an arithmetic number, because the mean of its divisors is an integer number (5455995357106).

Almost surely, 2^{121392666917420} is an apocalyptic number.

121392666917420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121392666917420 is an abundant number, since it is smaller than the sum of its proper divisors (140495110223668).

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

121392666917420 is a wasteful number, since it uses less digits than its factorization.

121392666917420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45941490 (or 45941488 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 59.

The spelling of 121392666917420 in words is "one hundred twenty-one trillion, three hundred ninety-two billion, six hundred sixty-six million, nine hundred seventeen thousand, four hundred twenty".