2100012212281 has 2 divisors, whose sum is σ = 2100012212282. Its totient is φ = 2100012212280.

The previous prime is 2100012212219. The next prime is 2100012212297. The reversal of 2100012212281 is 1822122100012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1382787846400 + 717224365881 = 1175920^2 + 846891^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100012212281 - 2⁷ = 2100012212153 is a prime.

It is a super-2 number, since 2×2100012212281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2100012212581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050006106140 + 1050006106141.

It is an arithmetic number, because the mean of its divisors is an integer number (1050006106141).

Almost surely, 2^{2100012212281} is an apocalyptic number.

It is an amenable number.

2100012212281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100012212281 is an equidigital number, since it uses as much as digits as its factorization.

2100012212281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 2100012212281 its reverse (1822122100012), we get a palindrome (3922134312293).

The spelling of 2100012212281 in words is "two trillion, one hundred billion, twelve million, two hundred twelve thousand, two hundred eighty-one".