21023121022 has 8 divisors (see below), whose sum is σ = 31782986496. Its totient is φ = 10428792192.

The previous prime is 21023121001. The next prime is 21023121037. The reversal of 21023121022 is 22012132012.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21023120987 and 21023121005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41383843 + ... + 41384350.

It is an arithmetic number, because the mean of its divisors is an integer number (3972873312).

Almost surely, 2^21023121022 is an apocalyptic number.

21023121022 is a deficient number, since it is larger than the sum of its proper divisors (10759865474).

21023121022 is a wasteful number, since it uses less digits than its factorization.

21023121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82768322.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21023121022 its reverse (22012132012), we get a palindrome (43035253034).

The spelling of 21023121022 in words is "twenty-one billion, twenty-three million, one hundred twenty-one thousand, twenty-two".