21214110023 has 4 divisors (see below), whose sum is σ = 21214436568. Its totient is φ = 21213783480.

The previous prime is 21214110019. The next prime is 21214110107. The reversal of 21214110023 is 32001141212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214110023 - 2² = 21214110019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21214109983 and 21214110010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214110013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29036 + ... + 208017.

It is an arithmetic number, because the mean of its divisors is an integer number (5303609142).

Almost surely, 2^21214110023 is an apocalyptic number.

21214110023 is a deficient number, since it is larger than the sum of its proper divisors (326545).

21214110023 is an equidigital number, since it uses as much as digits as its factorization.

21214110023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326544.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21214110023 its reverse (32001141212), we get a palindrome (53215251235).

The spelling of 21214110023 in words is "twenty-one billion, two hundred fourteen million, one hundred ten thousand, twenty-three".