21012200210222 has 16 divisors (see below), whose sum is σ = 33942860542080. Its totient is φ = 9697916962272.

The previous prime is 21012200210219. The next prime is 21012200210257. The reversal of 21012200210222 is 22201200221012.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012200210222.

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, 21898979 + ... + 22838337.

It is an arithmetic number, because the mean of its divisors is an integer number (2121428783880).

Almost surely, 2^{21012200210222} is an apocalyptic number.

21012200210222 is a deficient number, since it is larger than the sum of its proper divisors (12930660331858).

21012200210222 is a wasteful number, since it uses less digits than its factorization.

21012200210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799707.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21012200210222 its reverse (22201200221012), we get a palindrome (43213400431234).

The spelling of 21012200210222 in words is "twenty-one trillion, twelve billion, two hundred million, two hundred ten thousand, two hundred twenty-two".