121002021131 has 2 divisors, whose sum is σ = 121002021132. Its totient is φ = 121002021130.

The previous prime is 121002021079. The next prime is 121002021139. The reversal of 121002021131 is 131120200121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121002021131 is a prime.

It is a super-2 number, since 2×121002021131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121002021139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501010565 + 60501010566.

It is an arithmetic number, because the mean of its divisors is an integer number (60501010566).

Almost surely, 2^121002021131 is an apocalyptic number.

121002021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002021131 is an equidigital number, since it uses as much as digits as its factorization.

121002021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 121002021131 its reverse (131120200121), we get a palindrome (252122221252).

The spelling of 121002021131 in words is "one hundred twenty-one billion, two million, twenty-one thousand, one hundred thirty-one".