2801802810921 has 16 divisors (see below), whose sum is σ = 3756486901440. Its totient is φ = 1857494237760.

The previous prime is 2801802810913. The next prime is 2801802810931. The reversal of 2801802810921 is 1290182081082.

It is not a de Polignac number, because 2801802810921 - 2³ = 2801802810913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2801802810931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27948675 + ... + 28048743.

It is an arithmetic number, because the mean of its divisors is an integer number (234780431340).

Almost surely, 2^{2801802810921} is an apocalyptic number.

It is an amenable number.

2801802810921 is a deficient number, since it is larger than the sum of its proper divisors (954684090519).

2801802810921 is a wasteful number, since it uses less digits than its factorization.

2801802810921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151816.

The product of its (nonzero) digits is 36864, while the sum is 42.

The spelling of 2801802810921 in words is "two trillion, eight hundred one billion, eight hundred two million, eight hundred ten thousand, nine hundred twenty-one".