2806121421 has 8 divisors (see below), whose sum is σ = 4157216960. Its totient is φ = 1870747596.

The previous prime is 2806121413. The next prime is 2806121431. The reversal of 2806121421 is 1241216082.

2806121421 is a `hidden beast` number, since 2 + 8 + 0 + 612 + 1 + 42 + 1 = 666.

It is not a de Polignac number, because 2806121421 - 2³ = 2806121413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 103930423 = 2806121421 / (2 + 8 + 0 + 6 + 1 + 2 + 1 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2806121401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51965185 + ... + 51965238.

It is an arithmetic number, because the mean of its divisors is an integer number (519652120).

Almost surely, 2^2806121421 is an apocalyptic number.

It is an amenable number.

2806121421 is a deficient number, since it is larger than the sum of its proper divisors (1351095539).

2806121421 is a wasteful number, since it uses less digits than its factorization.

2806121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103930432 (or 103930426 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 2806121421 is about 52972.8366335049. The cubic root of 2806121421 is about 1410.4861293436.

The spelling of 2806121421 in words is "two billion, eight hundred six million, one hundred twenty-one thousand, four hundred twenty-one".