19912130001 has 12 divisors (see below), whose sum is σ = 28767594960. Its totient is φ = 13272155160.

The previous prime is 19912129997. The next prime is 19912130003. The reversal of 19912130001 is 10003121991.

It is not a de Polignac number, because 19912130001 - 2² = 19912129997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19912130003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167391 + ... + 260468.

It is an arithmetic number, because the mean of its divisors is an integer number (2397299580).

Almost surely, 2^19912130001 is an apocalyptic number.

It is an amenable number.

19912130001 is a deficient number, since it is larger than the sum of its proper divisors (8855464959).

19912130001 is a wasteful number, since it uses less digits than its factorization.

19912130001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433036 (or 433033 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

Adding to 19912130001 its reverse (10003121991), we get a palindrome (29915251992).

The spelling of 19912130001 in words is "nineteen billion, nine hundred twelve million, one hundred thirty thousand, one".