126106912621 has 2 divisors, whose sum is σ = 126106912622. Its totient is φ = 126106912620.

The previous prime is 126106912609. The next prime is 126106912627. The reversal of 126106912621 is 126219601621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124838555625 + 1268356996 = 353325^2 + 35614^2 .

It is a cyclic number.

It is not a de Polignac number, because 126106912621 - 2⁷ = 126106912493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126106912627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63053456310 + 63053456311.

It is an arithmetic number, because the mean of its divisors is an integer number (63053456311).

Almost surely, 2^126106912621 is an apocalyptic number.

It is an amenable number.

126106912621 is a deficient number, since it is larger than the sum of its proper divisors (1).

126106912621 is an equidigital number, since it uses as much as digits as its factorization.

126106912621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 126106912621 in words is "one hundred twenty-six billion, one hundred six million, nine hundred twelve thousand, six hundred twenty-one".