2878232121 has 12 divisors (see below), whose sum is σ = 4338205248. Its totient is φ = 1835394264.

The previous prime is 2878232069. The next prime is 2878232129. The reversal of 2878232121 is 1212328782.

It is not a de Polignac number, because 2878232121 - 2⁶ = 2878232057 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (2878232129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6952045 + ... + 6952458.

It is an arithmetic number, because the mean of its divisors is an integer number (361517104).

Almost surely, 2^2878232121 is an apocalyptic number.

It is an amenable number.

2878232121 is a deficient number, since it is larger than the sum of its proper divisors (1459973127).

2878232121 is a wasteful number, since it uses less digits than its factorization.

2878232121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13904532 (or 13904529 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 2878232121 is about 53649.1576914307. The cubic root of 2878232121 is about 1422.4661438297.

The spelling of 2878232121 in words is "two billion, eight hundred seventy-eight million, two hundred thirty-two thousand, one hundred twenty-one".