10001201021992 has 16 divisors (see below), whose sum is σ = 18758016567540. Its totient is φ = 4999063270656.

The previous prime is 10001201021969. The next prime is 10001201022049. The reversal of 10001201021992 is 29912010210001.

It can be written as a sum of positive squares in 2 ways, for example, as 6505325706916 + 3495875315076 = 2550554^2 + 1869726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 10001201021992.

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, 192127393 + ... + 192179440.

Almost surely, 2^{10001201021992} is an apocalyptic number.

It is an amenable number.

10001201021992 is a deficient number, since it is larger than the sum of its proper divisors (8756815545548).

10001201021992 is a wasteful number, since it uses less digits than its factorization.

10001201021992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384310092 (or 384310088 counting only the distinct ones).

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

Adding to 10001201021992 its reverse (29912010210001), we get a palindrome (39913211231993).

The spelling of 10001201021992 in words is "ten trillion, one billion, two hundred one million, twenty-one thousand, nine hundred ninety-two".