121220100000031 has 2 divisors, whose sum is σ = 121220100000032. Its totient is φ = 121220100000030.

The previous prime is 121220099999939. The next prime is 121220100000053. The reversal of 121220100000031 is 130000001022121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220100000031 is a prime.

It is a super-2 number, since 2×121220100000031² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121220099999957 and 121220100000020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220100000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610050000015 + 60610050000016.

It is an arithmetic number, because the mean of its divisors is an integer number (60610050000016).

Almost surely, 2^{121220100000031} is an apocalyptic number.

121220100000031 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220100000031 is an equidigital number, since it uses as much as digits as its factorization.

121220100000031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121220100000031 its reverse (130000001022121), we get a palindrome (251220101022152).

The spelling of 121220100000031 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred million, thirty-one", and thus it is an aban number.