21144234022 has 8 divisors (see below), whose sum is σ = 32810018400. Its totient is φ = 10207561224.

The previous prime is 21144234019. The next prime is 21144234031. The reversal of 21144234022 is 22043244112.

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

It is a super-3 number, since 3×21144234022³ (a number of 32 digits) contains 333 as substring.

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, 182277822 + ... + 182277937.

It is an arithmetic number, because the mean of its divisors is an integer number (4101252300).

Almost surely, 2^21144234022 is an apocalyptic number.

21144234022 is a deficient number, since it is larger than the sum of its proper divisors (11665784378).

21144234022 is a wasteful number, since it uses less digits than its factorization.

21144234022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364555790.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21144234022 its reverse (22043244112), we get a palindrome (43187478134).

The spelling of 21144234022 in words is "twenty-one billion, one hundred forty-four million, two hundred thirty-four thousand, twenty-two".