122011021021 has 2 divisors, whose sum is σ = 122011021022. Its totient is φ = 122011021020.

The previous prime is 122011021019. The next prime is 122011021043. The reversal of 122011021021 is 120120110221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92574756121 + 29436264900 = 304261^2 + 171570^2 .

It is a cyclic number.

It is not a de Polignac number, because 122011021021 - 2¹ = 122011021019 is a prime.

Together with 122011021019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 122011020992 and 122011021010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122011021921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61005510510 + 61005510511.

It is an arithmetic number, because the mean of its divisors is an integer number (61005510511).

Almost surely, 2^122011021021 is an apocalyptic number.

It is an amenable number.

122011021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122011021021 is an equidigital number, since it uses as much as digits as its factorization.

122011021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 122011021021 its reverse (120120110221), we get a palindrome (242131131242).

The spelling of 122011021021 in words is "one hundred twenty-two billion, eleven million, twenty-one thousand, twenty-one".