2122969878 has 16 divisors (see below), whose sum is σ = 4717710960. Its totient is φ = 707656608.

The previous prime is 2122969859. The next prime is 2122969903. The reversal of 2122969878 is 8789692212.

It is a super-2 number, since 2×2122969878² = 9014002205790669768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 39314257 = 2122969878 / (2 + 1 + 2 + 2 + 9 + 6 + 9 + 8 + 7 + 8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19657075 + ... + 19657182.

It is an arithmetic number, because the mean of its divisors is an integer number (294856935).

Almost surely, 2^2122969878 is an apocalyptic number.

2122969878 is an abundant number, since it is smaller than the sum of its proper divisors (2594741082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2122969878 is a wasteful number, since it uses less digits than its factorization.

2122969878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39314268 (or 39314262 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 2122969878 is about 46075.6972600524. The cubic root of 2122969878 is about 1285.2312519154.

The spelling of 2122969878 in words is "two billion, one hundred twenty-two million, nine hundred sixty-nine thousand, eight hundred seventy-eight".