21421343022 has 8 divisors (see below), whose sum is σ = 42842686056. Its totient is φ = 7140447672.

The previous prime is 21421342973. The next prime is 21421343023. The reversal of 21421343022 is 22034312412.

It is a happy number.

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

21421343022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21421342983 and 21421343001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421343023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1785111913 + ... + 1785111924.

It is an arithmetic number, because the mean of its divisors is an integer number (5355335757).

Almost surely, 2^21421343022 is an apocalyptic number.

21421343022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21421343022 is a wasteful number, since it uses less digits than its factorization.

21421343022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3570223842.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21421343022 its reverse (22034312412), we get a palindrome (43455655434).

The spelling of 21421343022 in words is "twenty-one billion, four hundred twenty-one million, three hundred forty-three thousand, twenty-two".