21400021322 has 32 divisors (see below), whose sum is σ = 32553166464. Its totient is φ = 10550433600.

The previous prime is 21400021273. The next prime is 21400021327. The reversal of 21400021322 is 22312000412.

It is a self number, because there is not a number n which added to its sum of digits gives 21400021322.

It is not an unprimeable number, because it can be changed into a prime (21400021327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38419868 + ... + 38420424.

It is an arithmetic number, because the mean of its divisors is an integer number (1017286452).

Almost surely, 2^21400021322 is an apocalyptic number.

21400021322 is a deficient number, since it is larger than the sum of its proper divisors (11153145142).

21400021322 is a wasteful number, since it uses less digits than its factorization.

21400021322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21400021322 its reverse (22312000412), we get a palindrome (43712021734).

The spelling of 21400021322 in words is "twenty-one billion, four hundred million, twenty-one thousand, three hundred twenty-two".