122112001021 has 2 divisors, whose sum is σ = 122112001022. Its totient is φ = 122112001020.

The previous prime is 122112001009. The next prime is 122112001133. The reversal of 122112001021 is 120100211221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61330522500 + 60781478521 = 247650^2 + 246539^2 .

It is a cyclic number.

It is not a de Polignac number, because 122112001021 - 2¹¹ = 122111998973 is a prime.

It is a super-2 number, since 2×122112001021² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122112000992 and 122112001010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122112005021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61056000510 + 61056000511.

It is an arithmetic number, because the mean of its divisors is an integer number (61056000511).

Almost surely, 2^122112001021 is an apocalyptic number.

It is an amenable number.

122112001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122112001021 is an equidigital number, since it uses as much as digits as its factorization.

122112001021 is an evil number, because the sum of its binary digits is even.

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

Adding to 122112001021 its reverse (120100211221), we get a palindrome (242212212242).

The spelling of 122112001021 in words is "one hundred twenty-two billion, one hundred twelve million, one thousand, twenty-one".