2122261879 has 4 divisors (see below), whose sum is σ = 2124030160. Its totient is φ = 2120493600.

The previous prime is 2122261877. The next prime is 2122261903. The reversal of 2122261879 is 9781622212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2122261879 - 2¹ = 2122261877 is a prime.

It is a super-2 number, since 2×2122261879² = 9007990966113221282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122261877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882339 + ... + 884740.

It is an arithmetic number, because the mean of its divisors is an integer number (531007540).

Almost surely, 2^2122261879 is an apocalyptic number.

2122261879 is a deficient number, since it is larger than the sum of its proper divisors (1768281).

2122261879 is a wasteful number, since it uses less digits than its factorization.

2122261879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768280.

The product of its digits is 48384, while the sum is 40.

The square root of 2122261879 is about 46068.0136211667. The cubic root of 2122261879 is about 1285.0883634673.

The spelling of 2122261879 in words is "two billion, one hundred twenty-two million, two hundred sixty-one thousand, eight hundred seventy-nine".