121211021249 has 2 divisors, whose sum is σ = 121211021250. Its totient is φ = 121211021248.

The previous prime is 121211021161. The next prime is 121211021279. The reversal of 121211021249 is 942120112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107426617600 + 13784403649 = 327760^2 + 117407^2 .

It is a cyclic number.

It is not a de Polignac number, because 121211021249 - 2²⁰ = 121209972673 is a prime.

It is a super-2 number, since 2×121211021249² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121211021279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605510624 + 60605510625.

It is an arithmetic number, because the mean of its divisors is an integer number (60605510625).

Almost surely, 2^121211021249 is an apocalyptic number.

It is an amenable number.

121211021249 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211021249 is an equidigital number, since it uses as much as digits as its factorization.

121211021249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 121211021249 in words is "one hundred twenty-one billion, two hundred eleven million, twenty-one thousand, two hundred forty-nine".