21102132023 has 16 divisors (see below), whose sum is σ = 25448048640. Its totient is φ = 17106720576.

The previous prime is 21102132019. The next prime is 21102132053. The reversal of 21102132023 is 32023120112.

It is a cyclic number.

It is not a de Polignac number, because 21102132023 - 2² = 21102132019 is a prime.

It is a super-2 number, since 2×21102132023² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21102131992 and 21102132010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102132053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 722015 + ... + 750672.

It is an arithmetic number, because the mean of its divisors is an integer number (1590503040).

Almost surely, 2^21102132023 is an apocalyptic number.

21102132023 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21102132023 is a deficient number, since it is larger than the sum of its proper divisors (4345916617).

21102132023 is a wasteful number, since it uses less digits than its factorization.

21102132023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472806.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21102132023 its reverse (32023120112), we get a palindrome (53125252135).

The spelling of 21102132023 in words is "twenty-one billion, one hundred two million, one hundred thirty-two thousand, twenty-three".