101042640023 has 4 divisors (see below), whose sum is σ = 108815150808. Its totient is φ = 93270129240.

The previous prime is 101042640001. The next prime is 101042640037. The reversal of 101042640023 is 320046240101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320046240101 = 7 ⋅45720891443.

It is a cyclic number.

It is not a de Polignac number, because 101042640023 - 2⁶ = 101042639959 is a prime.

It is a super-2 number, since 2×101042640023² (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 (101042640323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3886255373 + ... + 3886255398.

It is an arithmetic number, because the mean of its divisors is an integer number (27203787702).

Almost surely, 2^101042640023 is an apocalyptic number.

101042640023 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

101042640023 is a deficient number, since it is larger than the sum of its proper divisors (7772510785).

101042640023 is an equidigital number, since it uses as much as digits as its factorization.

101042640023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772510784.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 101042640023 its reverse (320046240101), we get a palindrome (421088880124).

The spelling of 101042640023 in words is "one hundred one billion, forty-two million, six hundred forty thousand, twenty-three".