121859139444 has 24 divisors (see below), whose sum is σ = 324957705408. Its totient is φ = 34816896960.

The previous prime is 121859139427. The next prime is 121859139463. The reversal of 121859139444 is 444931958121.

121859139444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 725351937 + ... + 725352104.

It is an arithmetic number, because the mean of its divisors is an integer number (13539904392).

Almost surely, 2^121859139444 is an apocalyptic number.

121859139444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121859139444 is an abundant number, since it is smaller than the sum of its proper divisors (203098565964).

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

121859139444 is a wasteful number, since it uses less digits than its factorization.

121859139444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450704055 (or 1450704053 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The spelling of 121859139444 in words is "one hundred twenty-one billion, eight hundred fifty-nine million, one hundred thirty-nine thousand, four hundred forty-four".