121221211023049 has 2 divisors, whose sum is σ = 121221211023050. Its totient is φ = 121221211023048.

The previous prime is 121221211022987. The next prime is 121221211023097. The reversal of 121221211023049 is 940320112122121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106289501702400 + 14931709320649 = 10309680^2 + 3864157^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221211023049 - 2²¹ = 121221208925897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121221211023049.

It is not a weakly prime, because it can be changed into another prime (121221211026049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610605511524 + 60610605511525.

It is an arithmetic number, because the mean of its divisors is an integer number (60610605511525).

Almost surely, 2^{121221211023049} is an apocalyptic number.

It is an amenable number.

121221211023049 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221211023049 is an equidigital number, since it uses as much as digits as its factorization.

121221211023049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 31.

The spelling of 121221211023049 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred eleven million, twenty-three thousand, forty-nine".