20100221223222 has 64 divisors (see below), whose sum is σ = 46027658147328. Its totient is φ = 5732385120000.

The previous prime is 20100221223167. The next prime is 20100221223223. The reversal of 20100221223222 is 22232212200102.

It is a super-2 number, since 2×20100221223222² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100221223223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369319572 + ... + 369373992.

It is an arithmetic number, because the mean of its divisors is an integer number (719182158552).

Almost surely, 2^{20100221223222} is an apocalyptic number.

20100221223222 is an abundant number, since it is smaller than the sum of its proper divisors (25927436924106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100221223222 is a wasteful number, since it uses less digits than its factorization.

20100221223222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70405.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20100221223222 its reverse (22232212200102), we get a palindrome (42332433423324).

The spelling of 20100221223222 in words is "twenty trillion, one hundred billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred twenty-two".