121301233021 has 2 divisors, whose sum is σ = 121301233022. Its totient is φ = 121301233020.

The previous prime is 121301232989. The next prime is 121301233073. The reversal of 121301233021 is 120332103121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64852224921 + 56449008100 = 254661^2 + 237590^2 .

It is an emirp because it is prime and its reverse (120332103121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121301233021 - 2⁵ = 121301232989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121301233021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121301233091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60650616510 + 60650616511.

It is an arithmetic number, because the mean of its divisors is an integer number (60650616511).

Almost surely, 2^121301233021 is an apocalyptic number.

It is an amenable number.

121301233021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121301233021 is an equidigital number, since it uses as much as digits as its factorization.

121301233021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121301233021 its reverse (120332103121), we get a palindrome (241633336142).

The spelling of 121301233021 in words is "one hundred twenty-one billion, three hundred one million, two hundred thirty-three thousand, twenty-one".