121273653650 has 24 divisors (see below), whose sum is σ = 235376345664. Its totient is φ = 46400354000.

The previous prime is 121273653619. The next prime is 121273653703. The reversal of 121273653650 is 56356372121.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 121273653598 and 121273653607.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52726526 + ... + 52728825.

It is an arithmetic number, because the mean of its divisors is an integer number (9807347736).

Almost surely, 2^121273653650 is an apocalyptic number.

121273653650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121273653650 is a deficient number, since it is larger than the sum of its proper divisors (114102692014).

121273653650 is a wasteful number, since it uses less digits than its factorization.

121273653650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105455386 (or 105455381 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 121273653650 in words is "one hundred twenty-one billion, two hundred seventy-three million, six hundred fifty-three thousand, six hundred fifty".