122021112212021 has 6 divisors (see below), whose sum is σ = 134122379538966. Its totient is φ = 110928283829000.

The previous prime is 122021112212017. The next prime is 122021112212039. The reversal of 122021112212021 is 120212211120221.

It can be written as a sum of positive squares in only one way, i.e., 121811815111921 + 209297100100 = 11036839^2 + 457490^2 .

It is not a de Polignac number, because 122021112212021 - 2² = 122021112212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122021112211984 and 122021112212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122021112212011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 504219471830 + ... + 504219472071.

It is an arithmetic number, because the mean of its divisors is an integer number (22353729923161).

Almost surely, 2^{122021112212021} is an apocalyptic number.

122021112212021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122021112212021 is a deficient number, since it is larger than the sum of its proper divisors (12101267326945).

122021112212021 is a wasteful number, since it uses less digits than its factorization.

122021112212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008438943923 (or 1008438943912 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 122021112212021 its reverse (120212211120221), we get a palindrome (242233323332242).

The spelling of 122021112212021 in words is "one hundred twenty-two trillion, twenty-one billion, one hundred twelve million, two hundred twelve thousand, twenty-one".