10120021123 has 4 divisors (see below), whose sum is σ = 10120226760. Its totient is φ = 10119815488.

The previous prime is 10120021099. The next prime is 10120021141. The reversal of 10120021123 is 32112002101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112002101 = 983 ⋅32667347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10120021123 is a prime.

It is a super-2 number, since 2×10120021123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10120021823) 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, 19536 + ... + 143602.

It is an arithmetic number, because the mean of its divisors is an integer number (2530056690).

Almost surely, 2^10120021123 is an apocalyptic number.

10120021123 is a deficient number, since it is larger than the sum of its proper divisors (205637).

10120021123 is an equidigital number, since it uses as much as digits as its factorization.

10120021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205636.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10120021123 its reverse (32112002101), we get a palindrome (42232023224).

The spelling of 10120021123 in words is "ten billion, one hundred twenty million, twenty-one thousand, one hundred twenty-three".