21481351122 has 64 divisors (see below), whose sum is σ = 53579750400. Its totient is φ = 5577919680.

The previous prime is 21481351103. The next prime is 21481351211. The reversal of 21481351122 is 22115318412.

It is a happy number.

It is a super-2 number, since 2×21481351122² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21481351122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2739904 + ... + 2747732.

It is an arithmetic number, because the mean of its divisors is an integer number (837183600).

Almost surely, 2^21481351122 is an apocalyptic number.

21481351122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21481351122 is an abundant number, since it is smaller than the sum of its proper divisors (32098399278).

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

21481351122 is a wasteful number, since it uses less digits than its factorization.

21481351122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13791.

The product of its digits is 3840, while the sum is 30.

Adding to 21481351122 its reverse (22115318412), we get a palindrome (43596669534).

The spelling of 21481351122 in words is "twenty-one billion, four hundred eighty-one million, three hundred fifty-one thousand, one hundred twenty-two".