121761606004 has 36 divisors (see below), whose sum is σ = 226399384960. Its totient is φ = 57288193920.

The previous prime is 121761605989. The next prime is 121761606007. The reversal of 121761606004 is 400606167121.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121761606007) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 9726109 + ... + 9738619.

Almost surely, 2^121761606004 is an apocalyptic number.

It is an amenable number.

121761606004 is a deficient number, since it is larger than the sum of its proper divisors (104637778956).

121761606004 is a wasteful number, since it uses less digits than its factorization.

121761606004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20968 (or 20949 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 121761606004 in words is "one hundred twenty-one billion, seven hundred sixty-one million, six hundred six thousand, four".