130211991 has 48 divisors (see below), whose sum is σ = 237799744. Its totient is φ = 66811392.

The previous prime is 130211971. The next prime is 130211999. The reversal of 130211991 is 199112031.

It is not a de Polignac number, because 130211991 - 2¹⁰ = 130210967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130211999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28155 + ... + 32451.

Almost surely, 2^130211991 is an apocalyptic number.

130211991 is a deficient number, since it is larger than the sum of its proper divisors (107587753).

130211991 is a wasteful number, since it uses less digits than its factorization.

130211991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360 (or 4357 counting only the distinct ones).

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

The square root of 130211991 is about 11411.0468844887. The cubic root of 130211991 is about 506.8549122091.

The spelling of 130211991 in words is "one hundred thirty million, two hundred eleven thousand, nine hundred ninety-one".