21030222323 has 16 divisors (see below), whose sum is σ = 23549108832. Its totient is φ = 18618720000.

The previous prime is 21030222307. The next prime is 21030222331. The reversal of 21030222323 is 32322203012.

It is a cyclic number.

It is not a de Polignac number, because 21030222323 - 2⁴ = 21030222307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21030222295 and 21030222304.

It is not an unprimeable number, because it can be changed into a prime (21030222383) 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, 87386 + ... + 222927.

It is an arithmetic number, because the mean of its divisors is an integer number (1471819302).

Almost surely, 2^21030222323 is an apocalyptic number.

21030222323 is a deficient number, since it is larger than the sum of its proper divisors (2518886509).

21030222323 is a wasteful number, since it uses less digits than its factorization.

21030222323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310486.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21030222323 its reverse (32322203012), we get a palindrome (53352425335).

The spelling of 21030222323 in words is "twenty-one billion, thirty million, two hundred twenty-two thousand, three hundred twenty-three".