21121300022 has 4 divisors (see below), whose sum is σ = 31681950036. Its totient is φ = 10560650010.

The previous prime is 21121300007. The next prime is 21121300043. The reversal of 21121300022 is 22000312112.

It is a happy number.

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

It is a super-2 number, since 2×21121300022² (a number of 21 digits) contains 22 as substring.

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, 5280325004 + ... + 5280325007.

It is an arithmetic number, because the mean of its divisors is an integer number (7920487509).

Almost surely, 2^21121300022 is an apocalyptic number.

21121300022 is a deficient number, since it is larger than the sum of its proper divisors (10560650014).

21121300022 is a wasteful number, since it uses less digits than its factorization.

21121300022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560650013.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21121300022 its reverse (22000312112), we get a palindrome (43121612134).

The spelling of 21121300022 in words is "twenty-one billion, one hundred twenty-one million, three hundred thousand, twenty-two".