2121490904 has 64 divisors (see below), whose sum is σ = 4631272800. Its totient is φ = 902513664.

The previous prime is 2121490883. The next prime is 2121491011. The reversal of 2121490904 is 4090941212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58604 + ... + 87620.

Almost surely, 2^2121490904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121490904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2315636400).

2121490904 is an abundant number, since it is smaller than the sum of its proper divisors (2509781896).

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

2121490904 is a wasteful number, since it uses less digits than its factorization.

2121490904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29092 (or 29088 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2121490904 is about 46059.6450702782. The cubic root of 2121490904 is about 1284.9327290456.

The spelling of 2121490904 in words is "two billion, one hundred twenty-one million, four hundred ninety thousand, nine hundred four".