10211021992 has 8 divisors (see below), whose sum is σ = 19145666250. Its totient is φ = 5105510992.

The previous prime is 10211021987. The next prime is 10211021993. The reversal of 10211021992 is 29912011201.

It can be written as a sum of positive squares in only one way, i.e., 6815162916 + 3395859076 = 82554^2 + 58274^2 .

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

It is a super-2 number, since 2×10211021992² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10211021992.

It is not an unprimeable number, because it can be changed into a prime (10211021993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638188867 + ... + 638188882.

Almost surely, 2^10211021992 is an apocalyptic number.

It is an amenable number.

10211021992 is a deficient number, since it is larger than the sum of its proper divisors (8934644258).

10211021992 is a wasteful number, since it uses less digits than its factorization.

10211021992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276377755 (or 1276377751 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 10211021992 in words is "ten billion, two hundred eleven million, twenty-one thousand, nine hundred ninety-two".