2220031123421 has 2 divisors, whose sum is σ = 2220031123422. Its totient is φ = 2220031123420.

The previous prime is 2220031123393. The next prime is 2220031123447. The reversal of 2220031123421 is 1243211300222.

2220031123421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166248804900 + 1053782318521 = 1079930^2 + 1026539^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220031123421 - 2²⁶ = 2219964014557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2220031120421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110015561710 + 1110015561711.

It is an arithmetic number, because the mean of its divisors is an integer number (1110015561711).

Almost surely, 2^{2220031123421} is an apocalyptic number.

It is an amenable number.

2220031123421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2220031123421 is an equidigital number, since it uses as much as digits as its factorization.

2220031123421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2220031123421 its reverse (1243211300222), we get a palindrome (3463242423643).

The spelling of 2220031123421 in words is "two trillion, two hundred twenty billion, thirty-one million, one hundred twenty-three thousand, four hundred twenty-one".