21122030423 has 8 divisors (see below), whose sum is σ = 22762740000. Its totient is φ = 19483597728.

The previous prime is 21122030417. The next prime is 21122030437. The reversal of 21122030423 is 32403022112.

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 21122030423 - 2⁴ = 21122030407 is a prime.

It is a super-2 number, since 2×21122030423² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122030395 and 21122030404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122030453) 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, 549923 + ... + 587076.

It is an arithmetic number, because the mean of its divisors is an integer number (2845342500).

Almost surely, 2^21122030423 is an apocalyptic number.

21122030423 is a deficient number, since it is larger than the sum of its proper divisors (1640709577).

21122030423 is a wasteful number, since it uses less digits than its factorization.

21122030423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138441.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21122030423 its reverse (32403022112), we get a palindrome (53525052535).

The spelling of 21122030423 in words is "twenty-one billion, one hundred twenty-two million, thirty thousand, four hundred twenty-three".