2123100422021 has 2 divisors, whose sum is σ = 2123100422022. Its totient is φ = 2123100422020.

The previous prime is 2123100421999. The next prime is 2123100422039. The reversal of 2123100422021 is 1202240013212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1951849291396 + 171251130625 = 1397086^2 + 413825^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123100422021 - 2¹⁰ = 2123100420997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123100421984 and 2123100422002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123100422321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061550211010 + 1061550211011.

It is an arithmetic number, because the mean of its divisors is an integer number (1061550211011).

Almost surely, 2^{2123100422021} is an apocalyptic number.

It is an amenable number.

2123100422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123100422021 is an equidigital number, since it uses as much as digits as its factorization.

2123100422021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2123100422021 its reverse (1202240013212), we get a palindrome (3325340435233).

The spelling of 2123100422021 in words is "two trillion, one hundred twenty-three billion, one hundred million, four hundred twenty-two thousand, twenty-one".