121223100131 has 8 divisors (see below), whose sum is σ = 141368047200. Its totient is φ = 103905514104.

The previous prime is 121223100121. The next prime is 121223100137. The reversal of 121223100131 is 131001322121.

It is a de Polignac number, because none of the positive numbers 2^k-121223100131 is a prime.

It is a super-2 number, since 2×121223100131² (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 (121223100137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176709716 + ... + 176710401.

It is an arithmetic number, because the mean of its divisors is an integer number (17671005900).

Almost surely, 2^121223100131 is an apocalyptic number.

121223100131 is a deficient number, since it is larger than the sum of its proper divisors (20144947069).

121223100131 is an frugal number, since it uses more digits than its factorization.

121223100131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353420138 (or 353420124 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121223100131 its reverse (131001322121), we get a palindrome (252224422252).

The spelling of 121223100131 in words is "one hundred twenty-one billion, two hundred twenty-three million, one hundred thousand, one hundred thirty-one".