121650428 has 6 divisors (see below), whose sum is σ = 212888256. Its totient is φ = 60825212.

The previous prime is 121650401. The next prime is 121650433. The reversal of 121650428 is 824056121.

It is a self number, because there is not a number n which added to its sum of digits gives 121650428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15206300 + ... + 15206307.

It is an arithmetic number, because the mean of its divisors is an integer number (35481376).

Almost surely, 2^121650428 is an apocalyptic number.

It is an amenable number.

121650428 is a deficient number, since it is larger than the sum of its proper divisors (91237828).

121650428 is a wasteful number, since it uses less digits than its factorization.

121650428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30412611 (or 30412609 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 121650428 is about 11029.5252844354. The cubic root of 121650428 is about 495.4934072789.

The spelling of 121650428 in words is "one hundred twenty-one million, six hundred fifty thousand, four hundred twenty-eight".