121402636245 has 32 divisors (see below), whose sum is σ = 235447539840. Its totient is φ = 58861883520.

The previous prime is 121402636241. The next prime is 121402636291. The reversal of 121402636245 is 542636204121.

121402636245 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 0 + 26 + 3 + 624 + 5 = 666.

It is not a de Polignac number, because 121402636245 - 2² = 121402636241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121402636241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40874824 + ... + 40877793.

It is an arithmetic number, because the mean of its divisors is an integer number (7357735620).

Almost surely, 2^121402636245 is an apocalyptic number.

121402636245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121402636245 is a deficient number, since it is larger than the sum of its proper divisors (114044903595).

121402636245 is a wasteful number, since it uses less digits than its factorization.

121402636245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81752642 (or 81752636 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 121402636245 in words is "one hundred twenty-one billion, four hundred two million, six hundred thirty-six thousand, two hundred forty-five".