21001111110023 has 8 divisors (see below), whose sum is σ = 22910746045440. Its totient is φ = 19091550010680.

The previous prime is 21001111109987. The next prime is 21001111110059. The reversal of 21001111110023 is 32001111110012.

It is an interprime number because it is at equal distance from previous prime (21001111109987) and next prime (21001111110059).

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

It is a cyclic number.

It is not a de Polignac number, because 21001111110023 - 2⁸ = 21001111109767 is a prime.

It is a super-2 number, since 2×21001111110023² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001111110073) 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, 17863463 + ... + 19002776.

It is an arithmetic number, because the mean of its divisors is an integer number (2863843255680).

Almost surely, 2^{21001111110023} is an apocalyptic number.

21001111110023 is a deficient number, since it is larger than the sum of its proper divisors (1909634935417).

21001111110023 is a wasteful number, since it uses less digits than its factorization.

21001111110023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36918037.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 21001111110023 its reverse (32001111110012), we get a palindrome (53002222220035).

The spelling of 21001111110023 in words is "twenty-one trillion, one billion, one hundred eleven million, one hundred ten thousand, twenty-three".