2279012121 has 9 divisors (see below), whose sum is σ = 3292113279. Its totient is φ = 1519245936.

The previous prime is 2279012059. The next prime is 2279012147. The reversal of 2279012121 is 1212109722.

The square root of 2279012121 is 47739.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1852011225 + 427000896 = 43035^2 + 20664^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2279012121 - 2¹⁷ = 2278881049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2279012161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 135261 + ... + 151173.

Almost surely, 2^2279012121 is an apocalyptic number.

2279012121 is the 47739-th square number.

2279012121 is the 23870-th centered octagonal number.

It is an amenable number.

2279012121 is a deficient number, since it is larger than the sum of its proper divisors (1013101158).

2279012121 is an frugal number, since it uses more digits than its factorization.

2279012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31832 (or 15916 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The cubic root of 2279012121 is about 1315.9787555890.

The spelling of 2279012121 in words is "two billion, two hundred seventy-nine million, twelve thousand, one hundred twenty-one".