121331323031 has 2 divisors, whose sum is σ = 121331323032. Its totient is φ = 121331323030.

The previous prime is 121331323021. The next prime is 121331323049. The reversal of 121331323031 is 130323133121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121331323031 is a prime.

It is a super-2 number, since 2×121331323031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121331322988 and 121331323006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121331323021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665661515 + 60665661516.

It is an arithmetic number, because the mean of its divisors is an integer number (60665661516).

Almost surely, 2^121331323031 is an apocalyptic number.

121331323031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331323031 is an equidigital number, since it uses as much as digits as its factorization.

121331323031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 121331323031 its reverse (130323133121), we get a palindrome (251654456152).

The spelling of 121331323031 in words is "one hundred twenty-one billion, three hundred thirty-one million, three hundred twenty-three thousand, thirty-one".