21400220222 has 16 divisors (see below), whose sum is σ = 32224500000. Its totient is φ = 10658799840.

The previous prime is 21400220213. The next prime is 21400220243. The reversal of 21400220222 is 22202200412.

It is a self number, because there is not a number n which added to its sum of digits gives 21400220222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532904 + ... + 571652.

It is an arithmetic number, because the mean of its divisors is an integer number (2014031250).

Almost surely, 2^21400220222 is an apocalyptic number.

21400220222 is a deficient number, since it is larger than the sum of its proper divisors (10824279778).

21400220222 is a wasteful number, since it uses less digits than its factorization.

21400220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39811.

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 21400220222 its reverse (22202200412), we get a palindrome (43602420634).

The spelling of 21400220222 in words is "twenty-one billion, four hundred million, two hundred twenty thousand, two hundred twenty-two".