21422311021 has 8 divisors (see below), whose sum is σ = 23074804224. Its totient is φ = 19829908560.

The previous prime is 21422310983. The next prime is 21422311073. The reversal of 21422311021 is 12011322412.

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

It is a cyclic number.

It is not a de Polignac number, because 21422311021 - 2⁹ = 21422310509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21422311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21422311321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15021946 + ... + 15023371.

It is an arithmetic number, because the mean of its divisors is an integer number (2884350528).

Almost surely, 2^21422311021 is an apocalyptic number.

It is an amenable number.

21422311021 is a deficient number, since it is larger than the sum of its proper divisors (1652493203).

21422311021 is a wasteful number, since it uses less digits than its factorization.

21422311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30045371.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21422311021 its reverse (12011322412), we get a palindrome (33433633433).

The spelling of 21422311021 in words is "twenty-one billion, four hundred twenty-two million, three hundred eleven thousand, twenty-one".