101242123431 has 4 divisors (see below), whose sum is σ = 134989497912. Its totient is φ = 67494748952.

The previous prime is 101242123427. The next prime is 101242123439. The reversal of 101242123431 is 134321242101.

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

It is a cyclic number.

It is not a de Polignac number, because 101242123431 - 2² = 101242123427 is a prime.

It is a super-2 number, since 2×101242123431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101242123439) 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, 16873687236 + ... + 16873687241.

It is an arithmetic number, because the mean of its divisors is an integer number (33747374478).

Almost surely, 2^101242123431 is an apocalyptic number.

101242123431 is a deficient number, since it is larger than the sum of its proper divisors (33747374481).

101242123431 is an equidigital number, since it uses as much as digits as its factorization.

101242123431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33747374480.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 101242123431 its reverse (134321242101), we get a palindrome (235563365532).

The spelling of 101242123431 in words is "one hundred one billion, two hundred forty-two million, one hundred twenty-three thousand, four hundred thirty-one".