121321133131 has 16 divisors (see below), whose sum is σ = 140257640448. Its totient is φ = 103713808000.

The previous prime is 121321133113. The next prime is 121321133161. The reversal of 121321133131 is 131331123121.

It is not a de Polignac number, because 121321133131 - 2¹⁵ = 121321100363 is a prime.

It is a super-2 number, since 2×121321133131² (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 (121321133161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66595 + ... + 497068.

It is an arithmetic number, because the mean of its divisors is an integer number (8766102528).

Almost surely, 2^121321133131 is an apocalyptic number.

121321133131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121321133131 is a deficient number, since it is larger than the sum of its proper divisors (18936507317).

121321133131 is a wasteful number, since it uses less digits than its factorization.

121321133131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564842.

The product of its digits is 324, while the sum is 22.

Adding to 121321133131 its reverse (131331123121), we get a palindrome (252652256252).

It can be divided in two parts, 121321 and 133131, that added together give a palindrome (254452).

The spelling of 121321133131 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-three thousand, one hundred thirty-one".