124226842781 has 4 divisors (see below), whose sum is σ = 124507264992. Its totient is φ = 123946420572.

The previous prime is 124226842741. The next prime is 124226842787. The reversal of 124226842781 is 187248622421.

It is a happy number.

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-124226842781 is a prime.

It is a super-2 number, since 2×124226842781² (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 (124226842787) 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, 140210441 + ... + 140211326.

It is an arithmetic number, because the mean of its divisors is an integer number (31126816248).

Almost surely, 2^124226842781 is an apocalyptic number.

It is an amenable number.

124226842781 is a deficient number, since it is larger than the sum of its proper divisors (280422211).

124226842781 is an equidigital number, since it uses as much as digits as its factorization.

124226842781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280422210.

The product of its digits is 688128, while the sum is 47.

The spelling of 124226842781 in words is "one hundred twenty-four billion, two hundred twenty-six million, eight hundred forty-two thousand, seven hundred eighty-one".