121397421356 has 48 divisors (see below), whose sum is σ = 226657714752. Its totient is φ = 56806041600.

The previous prime is 121397421317. The next prime is 121397421371. The reversal of 121397421356 is 653124793121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289940 + ... + 571716.

It is an arithmetic number, because the mean of its divisors is an integer number (4722035724).

Almost surely, 2^121397421356 is an apocalyptic number.

It is an amenable number.

121397421356 is a deficient number, since it is larger than the sum of its proper divisors (105260293396).

121397421356 is a wasteful number, since it uses less digits than its factorization.

121397421356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281930 (or 281928 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The spelling of 121397421356 in words is "one hundred twenty-one billion, three hundred ninety-seven million, four hundred twenty-one thousand, three hundred fifty-six".