2112621316 has 24 divisors (see below), whose sum is σ = 3984361304. Its totient is φ = 974350080.

The previous prime is 2112621307. The next prime is 2112621317. The reversal of 2112621316 is 6131262112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 277355716 + 1835265600 = 16654^2 + 42840^2 .

It is not an unprimeable number, because it can be changed into a prime (2112621317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61576 + ... + 89536.

Almost surely, 2^2112621316 is an apocalyptic number.

2112621316 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2112621316 is a deficient number, since it is larger than the sum of its proper divisors (1871739988).

2112621316 is a wasteful number, since it uses less digits than its factorization.

2112621316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29431 (or 29429 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 2112621316 is about 45963.2605022751. The cubic root of 2112621316 is about 1283.1395335770.

Adding to 2112621316 its reverse (6131262112), we get a palindrome (8243883428).

The spelling of 2112621316 in words is "two billion, one hundred twelve million, six hundred twenty-one thousand, three hundred sixteen".