121202230021 has 2 divisors, whose sum is σ = 121202230022. Its totient is φ = 121202230020.

The previous prime is 121202230013. The next prime is 121202230027. The reversal of 121202230021 is 120032202121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102457608100 + 18744621921 = 320090^2 + 136911^2 .

It is a cyclic number.

It is not a de Polignac number, because 121202230021 - 2³ = 121202230013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121202229977 and 121202230004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121202230027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601115010 + 60601115011.

It is an arithmetic number, because the mean of its divisors is an integer number (60601115011).

Almost surely, 2^121202230021 is an apocalyptic number.

It is an amenable number.

121202230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202230021 is an equidigital number, since it uses as much as digits as its factorization.

121202230021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121202230021 its reverse (120032202121), we get a palindrome (241234432142).

The spelling of 121202230021 in words is "one hundred twenty-one billion, two hundred two million, two hundred thirty thousand, twenty-one".