21011032103023 has 8 divisors (see below), whose sum is σ = 21120136950528. Its totient is φ = 20901929723904.

The previous prime is 21011032102987. The next prime is 21011032103093. The reversal of 21011032103023 is 32030123011012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21011032103023 is a prime.

It is a super-2 number, since 2×21011032103023² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011032103093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17887986 + ... + 19026352.

It is an arithmetic number, because the mean of its divisors is an integer number (2640017118816).

Almost surely, 2^{21011032103023} is an apocalyptic number.

21011032103023 is a deficient number, since it is larger than the sum of its proper divisors (109104847505).

21011032103023 is a wasteful number, since it uses less digits than its factorization.

21011032103023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234193.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21011032103023 its reverse (32030123011012), we get a palindrome (53041155114035).

The spelling of 21011032103023 in words is "twenty-one trillion, eleven billion, thirty-two million, one hundred three thousand, twenty-three".