21301143422440 has 32 divisors (see below), whose sum is σ = 54774368801280. Its totient is φ = 7303249173312.

The previous prime is 21301143422399. The next prime is 21301143422483. The reversal of 21301143422440 is 4422434110312.

It is a happy number.

It is a super-2 number, since 2×21301143422440² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38037755832 + ... + 38037756391.

It is an arithmetic number, because the mean of its divisors is an integer number (1711699025040).

Almost surely, 2^{21301143422440} is an apocalyptic number.

21301143422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21301143422440 is an abundant number, since it is smaller than the sum of its proper divisors (33473225378840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21301143422440 is a wasteful number, since it uses less digits than its factorization.

21301143422440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76075512241 (or 76075512237 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 21301143422440 its reverse (4422434110312), we get a palindrome (25723577532752).

The spelling of 21301143422440 in words is "twenty-one trillion, three hundred one billion, one hundred forty-three million, four hundred twenty-two thousand, four hundred forty".