121663500192 has 108 divisors (see below), whose sum is σ = 374641841574. Its totient is φ = 37434908160.

The previous prime is 121663500191. The next prime is 121663500199. The reversal of 121663500192 is 291005366121.

121663500192 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 63 + 500 + 1 + 92 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 103480595856 + 18182904336 = 321684^2 + 134844^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121663500191) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1201159 + ... + 1298502.

Almost surely, 2^121663500192 is an apocalyptic number.

121663500192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121663500192 is an abundant number, since it is smaller than the sum of its proper divisors (252978341382).

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

121663500192 is a wasteful number, since it uses less digits than its factorization.

121663500192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499703 (or 2499679 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 121663500192 in words is "one hundred twenty-one billion, six hundred sixty-three million, five hundred thousand, one hundred ninety-two".