122000221120021 has 2 divisors, whose sum is σ = 122000221120022. Its totient is φ = 122000221120020.

The previous prime is 122000221120007. The next prime is 122000221120031. The reversal of 122000221120021 is 120021122000221.

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., 120327955748100 + 1672265371921 = 10969410^2 + 1293161^2 .

It is a cyclic number.

It is not a de Polignac number, because 122000221120021 - 2¹⁵ = 122000221087253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122000221119977 and 122000221120004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122000221120031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61000110560010 + 61000110560011.

It is an arithmetic number, because the mean of its divisors is an integer number (61000110560011).

Almost surely, 2^{122000221120021} is an apocalyptic number.

It is an amenable number.

122000221120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122000221120021 is an equidigital number, since it uses as much as digits as its factorization.

122000221120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122000221120021 its reverse (120021122000221), we get a palindrome (242021343120242).

It can be divided in two parts, 122000221 and 120021, that multiplied together give a palindrome (14642588524641).

The spelling of 122000221120021 in words is "one hundred twenty-two trillion, two hundred twenty-one million, one hundred twenty thousand, twenty-one".