121012311001 has 2 divisors, whose sum is σ = 121012311002. Its totient is φ = 121012311000.

The previous prime is 121012310957. The next prime is 121012311041. The reversal of 121012311001 is 100113210121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106651883776 + 14360427225 = 326576^2 + 119835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012311001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012311041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506155500 + 60506155501.

It is an arithmetic number, because the mean of its divisors is an integer number (60506155501).

Almost surely, 2^121012311001 is an apocalyptic number.

It is an amenable number.

121012311001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012311001 is an equidigital number, since it uses as much as digits as its factorization.

121012311001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121012311001 its reverse (100113210121), we get a palindrome (221125521122).

The spelling of 121012311001 in words is "one hundred twenty-one billion, twelve million, three hundred eleven thousand, one".