129953809111 has 4 divisors (see below), whose sum is σ = 148518638992. Its totient is φ = 111388979232.

The previous prime is 129953809057. The next prime is 129953809133. The reversal of 129953809111 is 111908359921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111908359921 = 2287 ⋅48932383.

It is a cyclic number.

It is not a de Polignac number, because 129953809111 - 2²⁷ = 129819591383 is a prime.

It is a super-2 number, since 2×129953809111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129953809171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9282414930 + ... + 9282414943.

It is an arithmetic number, because the mean of its divisors is an integer number (37129659748).

Almost surely, 2^129953809111 is an apocalyptic number.

129953809111 is a deficient number, since it is larger than the sum of its proper divisors (18564829881).

129953809111 is an equidigital number, since it uses as much as digits as its factorization.

129953809111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18564829880.

The product of its (nonzero) digits is 174960, while the sum is 49.

The spelling of 129953809111 in words is "one hundred twenty-nine billion, nine hundred fifty-three million, eight hundred nine thousand, one hundred eleven".