102121011131 has 4 divisors (see below), whose sum is σ = 102357951264. Its totient is φ = 101884071000.

The previous prime is 102121011127. The next prime is 102121011169. The reversal of 102121011131 is 131110121201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131110121201 = 4481 ⋅29259121.

It is a cyclic number.

It is not a de Polignac number, because 102121011131 - 2² = 102121011127 is a prime.

It is a super-2 number, since 2×102121011131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121011631) 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, 118469420 + ... + 118470281.

It is an arithmetic number, because the mean of its divisors is an integer number (25589487816).

Almost surely, 2^102121011131 is an apocalyptic number.

102121011131 is a deficient number, since it is larger than the sum of its proper divisors (236940133).

102121011131 is an equidigital number, since it uses as much as digits as its factorization.

102121011131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236940132.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 102121011131 its reverse (131110121201), we get a palindrome (233231132332).

The spelling of 102121011131 in words is "one hundred two billion, one hundred twenty-one million, eleven thousand, one hundred thirty-one".