21103203122023 has 4 divisors (see below), whose sum is σ = 23021676133128. Its totient is φ = 19184730110920.

The previous prime is 21103203121967. The next prime is 21103203122147. The reversal of 21103203122023 is 32022130230112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21103203122023 is a prime.

It is a super-2 number, since 2×21103203122023² (a number of 27 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 = 21103203121985 and 21103203122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103203122623) 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, 959236505536 + ... + 959236505557.

It is an arithmetic number, because the mean of its divisors is an integer number (5755419033282).

Almost surely, 2^{21103203122023} is an apocalyptic number.

21103203122023 is a deficient number, since it is larger than the sum of its proper divisors (1918473011105).

21103203122023 is a wasteful number, since it uses less digits than its factorization.

21103203122023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918473011104.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21103203122023 its reverse (32022130230112), we get a palindrome (53125333352135).

The spelling of 21103203122023 in words is "twenty-one trillion, one hundred three billion, two hundred three million, one hundred twenty-two thousand, twenty-three".