21100340222 has 16 divisors (see below), whose sum is σ = 34258194432. Its totient is φ = 9689181600.

The previous prime is 21100340221. The next prime is 21100340269. The reversal of 21100340222 is 22204300112.

It is a self number, because there is not a number n which added to its sum of digits gives 21100340222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100340221) 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, 2054654 + ... + 2064897.

It is an arithmetic number, because the mean of its divisors is an integer number (2141137152).

Almost surely, 2^21100340222 is an apocalyptic number.

21100340222 is a deficient number, since it is larger than the sum of its proper divisors (13157854210).

21100340222 is a wasteful number, since it uses less digits than its factorization.

21100340222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119763.

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

Adding to 21100340222 its reverse (22204300112), we get a palindrome (43304640334).

The spelling of 21100340222 in words is "twenty-one billion, one hundred million, three hundred forty thousand, two hundred twenty-two".