2681106921 has 24 divisors (see below), whose sum is σ = 3905982080. Its totient is φ = 1772085600.

The previous prime is 2681106917. The next prime is 2681106943. The reversal of 2681106921 is 1296011862.

It is not a de Polignac number, because 2681106921 - 2² = 2681106917 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2681106971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1539111 + ... + 1540851.

Almost surely, 2^2681106921 is an apocalyptic number.

It is an amenable number.

2681106921 is a deficient number, since it is larger than the sum of its proper divisors (1224875159).

2681106921 is a wasteful number, since it uses less digits than its factorization.

2681106921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3114 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2681106921 is about 51779.4063407452. The cubic root of 2681106921 is about 1389.2211223954.

The spelling of 2681106921 in words is "two billion, six hundred eighty-one million, one hundred six thousand, nine hundred twenty-one".