121404402 has 96 divisors (see below), whose sum is σ = 310856832. Its totient is φ = 33530112.

The previous prime is 121404383. The next prime is 121404449. The reversal of 121404402 is 204404121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 616168 + ... + 616364.

It is an arithmetic number, because the mean of its divisors is an integer number (3238092).

Almost surely, 2^121404402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121404402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155428416).

121404402 is an abundant number, since it is smaller than the sum of its proper divisors (189452430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121404402 is a wasteful number, since it uses less digits than its factorization.

121404402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121404402 is about 11018.3665758587. The cubic root of 121404402 is about 495.1591529863.

Adding to 121404402 its reverse (204404121), we get a palindrome (325808523).

The spelling of 121404402 in words is "one hundred twenty-one million, four hundred four thousand, four hundred two".