121420408 has 8 divisors (see below), whose sum is σ = 227663280. Its totient is φ = 60710200.

The previous prime is 121420391. The next prime is 121420501. The reversal of 121420408 is 804024121.

It is a tau number, because it is divible by the number of its divisors (8).

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, 7588768 + ... + 7588783.

It is an arithmetic number, because the mean of its divisors is an integer number (28457910).

Almost surely, 2^121420408 is an apocalyptic number.

It is an amenable number.

121420408 is a deficient number, since it is larger than the sum of its proper divisors (106242872).

121420408 is a wasteful number, since it uses less digits than its factorization.

121420408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15177557 (or 15177553 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 121420408 is about 11019.0928846253. The cubic root of 121420408 is about 495.1809126836.

Adding to 121420408 its reverse (804024121), we get a palindrome (925444529).

The spelling of 121420408 in words is "one hundred twenty-one million, four hundred twenty thousand, four hundred eight".