121012220137 has 2 divisors, whose sum is σ = 121012220138. Its totient is φ = 121012220136.

The previous prime is 121012220071. The next prime is 121012220167. The reversal of 121012220137 is 731022210121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78277407961 + 42734812176 = 279781^2 + 206724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012220137 is a prime.

It is not a weakly prime, because it can be changed into another prime (121012220167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60506110068 + 60506110069.

It is an arithmetic number, because the mean of its divisors is an integer number (60506110069).

Almost surely, 2^121012220137 is an apocalyptic number.

It is an amenable number.

121012220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

121012220137 is an equidigital number, since it uses as much as digits as its factorization.

121012220137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 121012220137 its reverse (731022210121), we get a palindrome (852034430258).

The spelling of 121012220137 in words is "one hundred twenty-one billion, twelve million, two hundred twenty thousand, one hundred thirty-seven".