126352210055621 has 4 divisors (see below), whose sum is σ = 137838774606144. Its totient is φ = 114865645505100.

The previous prime is 126352210055611. The next prime is 126352210055627. The reversal of 126352210055621 is 126550012253621.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126352210055621 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 (126352210055627) 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, 5743282275245 + ... + 5743282275266.

It is an arithmetic number, because the mean of its divisors is an integer number (34459693651536).

Almost surely, 2^{126352210055621} is an apocalyptic number.

126352210055621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126352210055621 is a deficient number, since it is larger than the sum of its proper divisors (11486564550523).

126352210055621 is a wasteful number, since it uses less digits than its factorization.

126352210055621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11486564550522.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 126352210055621 in words is "one hundred twenty-six trillion, three hundred fifty-two billion, two hundred ten million, fifty-five thousand, six hundred twenty-one".