21000112022 has 4 divisors (see below), whose sum is σ = 31500168036. Its totient is φ = 10500056010.

The previous prime is 21000112013. The next prime is 21000112031. The reversal of 21000112022 is 22021100012.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (21000112013) and next prime (21000112031).

It is a junction number, because it is equal to n+sod(n) for n = 21000111994 and 21000112012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250028004 + ... + 5250028007.

It is an arithmetic number, because the mean of its divisors is an integer number (7875042009).

Almost surely, 2^21000112022 is an apocalyptic number.

21000112022 is a deficient number, since it is larger than the sum of its proper divisors (10500056014).

21000112022 is a wasteful number, since it uses less digits than its factorization.

21000112022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500056013.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21000112022 its reverse (22021100012), we get a palindrome (43021212034).

The spelling of 21000112022 in words is "twenty-one billion, one hundred twelve thousand, twenty-two".