21021222122023 has 8 divisors (see below), whose sum is σ = 21546099556128. Its totient is φ = 20501094710304.

The previous prime is 21021222122009. The next prime is 21021222122027. The reversal of 21021222122023 is 32022122212012.

It is a happy number.

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-21021222122023 is a prime.

It is a super-2 number, since 2×21021222122023² (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 = 21021222121985 and 21021222122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021222122027) 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, 1187496636 + ... + 1187514337.

It is an arithmetic number, because the mean of its divisors is an integer number (2693262444516).

Almost surely, 2^{21021222122023} is an apocalyptic number.

21021222122023 is a deficient number, since it is larger than the sum of its proper divisors (524877434105).

21021222122023 is a wasteful number, since it uses less digits than its factorization.

21021222122023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375011193.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21021222122023 its reverse (32022122212012), we get a palindrome (53043344334035).

The spelling of 21021222122023 in words is "twenty-one trillion, twenty-one billion, two hundred twenty-two million, one hundred twenty-two thousand, twenty-three".