121211122001 has 2 divisors, whose sum is σ = 121211122002. Its totient is φ = 121211122000.

The previous prime is 121211121973. The next prime is 121211122007. The reversal of 121211122001 is 100221112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114649960000 + 6561162001 = 338600^2 + 81001^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211122001 - 2⁶ = 121211121937 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211122007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605561000 + 60605561001.

It is an arithmetic number, because the mean of its divisors is an integer number (60605561001).

Almost surely, 2^121211122001 is an apocalyptic number.

It is an amenable number.

121211122001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211122001 is an equidigital number, since it uses as much as digits as its factorization.

121211122001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211122001 its reverse (100221112121), we get a palindrome (221432234122).

The spelling of 121211122001 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, one".