21200212192 has 24 divisors (see below), whose sum is σ = 41780699856. Its totient is φ = 10589240832.

The previous prime is 21200212133. The next prime is 21200212193. The reversal of 21200212192 is 29121200212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200212193) 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, 307788 + ... + 370315.

It is an arithmetic number, because the mean of its divisors is an integer number (1740862494).

Almost surely, 2^21200212192 is an apocalyptic number.

It is an amenable number.

21200212192 is a deficient number, since it is larger than the sum of its proper divisors (20580487664).

21200212192 is an equidigital number, since it uses as much as digits as its factorization.

21200212192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679090 (or 679082 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

It can be divided in two parts, 21200212 and 192, that multiplied together give a palindrome (4070440704).

The spelling of 21200212192 in words is "twenty-one billion, two hundred million, two hundred twelve thousand, one hundred ninety-two".