121022200202021 has 2 divisors, whose sum is σ = 121022200202022. Its totient is φ = 121022200202020.

The previous prime is 121022200201979. The next prime is 121022200202041. The reversal of 121022200202021 is 120202002220121.

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., 120738649276996 + 283550925025 = 10988114^2 + 532495^2 .

It is a cyclic number.

It is not a de Polignac number, because 121022200202021 - 2¹⁸ = 121022199939877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121022200202041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60511100101010 + 60511100101011.

It is an arithmetic number, because the mean of its divisors is an integer number (60511100101011).

Almost surely, 2^{121022200202021} is an apocalyptic number.

It is an amenable number.

121022200202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121022200202021 is an equidigital number, since it uses as much as digits as its factorization.

121022200202021 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 17.

Adding to 121022200202021 its reverse (120202002220121), we get a palindrome (241224202422142).

The spelling of 121022200202021 in words is "one hundred twenty-one trillion, twenty-two billion, two hundred million, two hundred two thousand, twenty-one".