21431212022 has 8 divisors (see below), whose sum is σ = 35069256072. Its totient is φ = 9741460000.

The previous prime is 21431212009. The next prime is 21431212069. The reversal of 21431212022 is 22021213412.

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

It is a junction number, because it is equal to n+sod(n) for n = 21431211985 and 21431212003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487072979 + ... + 487073022.

It is an arithmetic number, because the mean of its divisors is an integer number (4383657009).

Almost surely, 2^21431212022 is an apocalyptic number.

21431212022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21431212022 is a deficient number, since it is larger than the sum of its proper divisors (13638044050).

21431212022 is a wasteful number, since it uses less digits than its factorization.

21431212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974146014.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21431212022 its reverse (22021213412), we get a palindrome (43452425434).

The spelling of 21431212022 in words is "twenty-one billion, four hundred thirty-one million, two hundred twelve thousand, twenty-two".