121865695804 has 24 divisors (see below), whose sum is σ = 218988075600. Its totient is φ = 59304769920.

The previous prime is 121865695793. The next prime is 121865695877. The reversal of 121865695804 is 408596568121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818019 + ... + 955450.

It is an arithmetic number, because the mean of its divisors is an integer number (9124503150).

Almost surely, 2^121865695804 is an apocalyptic number.

It is an amenable number.

121865695804 is a deficient number, since it is larger than the sum of its proper divisors (97122379796).

121865695804 is a wasteful number, since it uses less digits than its factorization.

121865695804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773933 (or 1773931 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 121865695804 in words is "one hundred twenty-one billion, eight hundred sixty-five million, six hundred ninety-five thousand, eight hundred four".