2122122987 has 12 divisors (see below), whose sum is σ = 3070518360. Its totient is φ = 1412335008.

The previous prime is 2122122973. The next prime is 2122123007. The reversal of 2122122987 is 7892212212.

It is not a de Polignac number, because 2122122987 - 2¹⁵ = 2122090219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2122122907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195562 + ... + 206127.

It is an arithmetic number, because the mean of its divisors is an integer number (255876530).

Almost surely, 2^2122122987 is an apocalyptic number.

2122122987 is a deficient number, since it is larger than the sum of its proper divisors (948395373).

2122122987 is a wasteful number, since it uses less digits than its factorization.

2122122987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402282 (or 402279 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 2122122987 is about 46066.5061297251. The cubic root of 2122122987 is about 1285.0603285378.

The spelling of 2122122987 in words is "two billion, one hundred twenty-two million, one hundred twenty-two thousand, nine hundred eighty-seven".