2121776004 has 24 divisors (see below), whose sum is σ = 5065947040. Its totient is φ = 690810624.

The previous prime is 2121775987. The next prime is 2121776017. The reversal of 2121776004 is 4006771212.

It is a super-2 number, since 2×2121776004² = 9003866822300416032, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2055469 + ... + 2056500.

Almost surely, 2^2121776004 is an apocalyptic number.

It is an amenable number.

2121776004 is an abundant number, since it is smaller than the sum of its proper divisors (2944171036).

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

2121776004 is a wasteful number, since it uses less digits than its factorization.

2121776004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4112019 (or 4112017 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 2121776004 is about 46062.7398664040. The cubic root of 2121776004 is about 1284.9902857245.

The spelling of 2121776004 in words is "two billion, one hundred twenty-one million, seven hundred seventy-six thousand, four".