121776540620 has 48 divisors (see below), whose sum is σ = 292468131648. Its totient is φ = 41722752000.

The previous prime is 121776540527. The next prime is 121776540643. The reversal of 121776540620 is 26045677121.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102881 + ... + 504120.

It is an arithmetic number, because the mean of its divisors is an integer number (6093086076).

Almost surely, 2^121776540620 is an apocalyptic number.

121776540620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121776540620 is an abundant number, since it is smaller than the sum of its proper divisors (170691591028).

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

121776540620 is a wasteful number, since it uses less digits than its factorization.

121776540620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608450 (or 608448 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 121776540620 in words is "one hundred twenty-one billion, seven hundred seventy-six million, five hundred forty thousand, six hundred twenty".