124100320021 has 4 divisors (see below), whose sum is σ = 124101804832. Its totient is φ = 124098835212.

The previous prime is 124100319929. The next prime is 124100320031. The reversal of 124100320021 is 120023001421.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120023001421 = 79 ⋅1519278499.

It is a cyclic number.

It is not a de Polignac number, because 124100320021 - 2⁹ = 124100319509 is a prime.

It is a super-2 number, since 2×124100320021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124100319977 and 124100320004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124100320031) 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, 609051 + ... + 786856.

It is an arithmetic number, because the mean of its divisors is an integer number (31025451208).

Almost surely, 2^124100320021 is an apocalyptic number.

It is an amenable number.

124100320021 is a deficient number, since it is larger than the sum of its proper divisors (1484811).

124100320021 is an equidigital number, since it uses as much as digits as its factorization.

124100320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484810.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 124100320021 its reverse (120023001421), we get a palindrome (244123321442).

The spelling of 124100320021 in words is "one hundred twenty-four billion, one hundred million, three hundred twenty thousand, twenty-one".