126255220501 has 4 divisors (see below), whose sum is σ = 126277187500. Its totient is φ = 126233253504.

The previous prime is 126255220471. The next prime is 126255220547. The reversal of 126255220501 is 105022552621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53652456900 + 72602763601 = 231630^2 + 269449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126255220501 is a prime.

It is a super-2 number, since 2×126255220501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126255200501) 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, 10974876 + ... + 10986373.

It is an arithmetic number, because the mean of its divisors is an integer number (31569296875).

Almost surely, 2^126255220501 is an apocalyptic number.

It is an amenable number.

126255220501 is a deficient number, since it is larger than the sum of its proper divisors (21966999).

126255220501 is an equidigital number, since it uses as much as digits as its factorization.

126255220501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21966998.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 126255220501 in words is "one hundred twenty-six billion, two hundred fifty-five million, two hundred twenty thousand, five hundred one".