212100999976 has 16 divisors (see below), whose sum is σ = 398943920340. Its totient is φ = 105715954560.

The previous prime is 212100999947. The next prime is 212101000003. The reversal of 212100999976 is 679999001212.

It can be written as a sum of positive squares in 2 ways, for example, as 207070502500 + 5030497476 = 455050^2 + 70926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41815485 + ... + 41820556.

Almost surely, 2^212100999976 is an apocalyptic number.

It is an amenable number.

212100999976 is a deficient number, since it is larger than the sum of its proper divisors (186842920364).

212100999976 is a wasteful number, since it uses less digits than its factorization.

212100999976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83636364 (or 83636360 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 55.

The spelling of 212100999976 in words is "two hundred twelve billion, one hundred million, nine hundred ninety-nine thousand, nine hundred seventy-six".