2121019976 has 8 divisors (see below), whose sum is σ = 3976912470. Its totient is φ = 1060509984.

The previous prime is 2121019973. The next prime is 2121019987. The reversal of 2121019976 is 6799101212.

It can be written as a sum of positive squares in only one way, i.e., 1961604100 + 159415876 = 44290^2 + 12626^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2121019973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132563741 + ... + 132563756.

Almost surely, 2^2121019976 is an apocalyptic number.

It is an amenable number.

2121019976 is a deficient number, since it is larger than the sum of its proper divisors (1855892494).

2121019976 is a wasteful number, since it uses less digits than its factorization.

2121019976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265127503 (or 265127499 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 2121019976 is about 46054.5326325216. The cubic root of 2121019976 is about 1284.8376456652.

The spelling of 2121019976 in words is "two billion, one hundred twenty-one million, nineteen thousand, nine hundred seventy-six".