2121490472 has 8 divisors (see below), whose sum is σ = 3977794650. Its totient is φ = 1060745232.

The previous prime is 2121490457. The next prime is 2121490489. The reversal of 2121490472 is 2740941212.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2092696516 + 28793956 = 45746^2 + 5366^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132593147 + ... + 132593162.

Almost surely, 2^2121490472 is an apocalyptic number.

It is an amenable number.

2121490472 is a deficient number, since it is larger than the sum of its proper divisors (1856304178).

2121490472 is a wasteful number, since it uses less digits than its factorization.

2121490472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265186315 (or 265186311 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2121490472 is about 46059.6403807064. The cubic root of 2121490472 is about 1284.9326418285.

The spelling of 2121490472 in words is "two billion, one hundred twenty-one million, four hundred ninety thousand, four hundred seventy-two".