121122022012021 has 2 divisors, whose sum is σ = 121122022012022. Its totient is φ = 121122022012020.

The previous prime is 121122022011973. The next prime is 121122022012109. The reversal of 121122022012021 is 120210220221121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78238252967121 + 42883769044900 = 8845239^2 + 6548570^2 .

It is a cyclic number.

It is not a de Polignac number, because 121122022012021 - 2³⁵ = 121087662273653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121122022012021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121122022018021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60561011006010 + 60561011006011.

It is an arithmetic number, because the mean of its divisors is an integer number (60561011006011).

Almost surely, 2^{121122022012021} is an apocalyptic number.

It is an amenable number.

121122022012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121122022012021 is an equidigital number, since it uses as much as digits as its factorization.

121122022012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121122022012021 its reverse (120210220221121), we get a palindrome (241332242233142).

The spelling of 121122022012021 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, twenty-two million, twelve thousand, twenty-one".