121901428 has 24 divisors (see below), whose sum is σ = 233220960. Its totient is φ = 55290720.

The previous prime is 121901419. The next prime is 121901443. The reversal of 121901428 is 824109121.

It is a junction number, because it is equal to n+sod(n) for n = 121901396 and 121901405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19675 + ... + 25117.

It is an arithmetic number, because the mean of its divisors is an integer number (9717540).

Almost surely, 2^121901428 is an apocalyptic number.

It is an amenable number.

121901428 is a deficient number, since it is larger than the sum of its proper divisors (111319532).

121901428 is a wasteful number, since it uses less digits than its factorization.

121901428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5967 (or 5965 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 121901428 is about 11040.8979707268. The cubic root of 121901428 is about 495.8339552158.

The spelling of 121901428 in words is "one hundred twenty-one million, nine hundred one thousand, four hundred twenty-eight".