126702332221 has 4 divisors (see below), whose sum is σ = 126707040352. Its totient is φ = 126697624092.

The previous prime is 126702332203. The next prime is 126702332233. The reversal of 126702332221 is 122233207621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122233207621 = 7 ⋅17461886803.

It is a cyclic number.

It is not a de Polignac number, because 126702332221 - 2⁵ = 126702332189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126702332291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2313465 + ... + 2367598.

It is an arithmetic number, because the mean of its divisors is an integer number (31676760088).

Almost surely, 2^126702332221 is an apocalyptic number.

It is an amenable number.

126702332221 is a deficient number, since it is larger than the sum of its proper divisors (4708131).

126702332221 is an equidigital number, since it uses as much as digits as its factorization.

126702332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708130.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 126702332221 its reverse (122233207621), we get a palindrome (248935539842).

The spelling of 126702332221 in words is "one hundred twenty-six billion, seven hundred two million, three hundred thirty-two thousand, two hundred twenty-one".