1222120022621 has 2 divisors, whose sum is σ = 1222120022622. Its totient is φ = 1222120022620.

The previous prime is 1222120022549. The next prime is 1222120022623. The reversal of 1222120022621 is 1262200212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1178225582521 + 43894440100 = 1085461^2 + 209510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222120022621 is a prime.

Together with 1222120022623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222120022623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611060011310 + 611060011311.

It is an arithmetic number, because the mean of its divisors is an integer number (611060011311).

Almost surely, 2^{1222120022621} is an apocalyptic number.

It is an amenable number.

1222120022621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222120022621 is an equidigital number, since it uses as much as digits as its factorization.

1222120022621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1222120022621 its reverse (1262200212221), we get a palindrome (2484320234842).

The spelling of 1222120022621 in words is "one trillion, two hundred twenty-two billion, one hundred twenty million, twenty-two thousand, six hundred twenty-one".