20100123222 has 16 divisors (see below), whose sum is σ = 40202400432. Its totient is φ = 6699682080.

The previous prime is 20100123193. The next prime is 20100123257. The reversal of 20100123222 is 22232100102.

It is a happy number.

It is a super-2 number, since 2×20100123222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47772 + ... + 206112.

It is an arithmetic number, because the mean of its divisors is an integer number (2512650027).

Almost surely, 2^20100123222 is an apocalyptic number.

20100123222 is an abundant number, since it is smaller than the sum of its proper divisors (20102277210).

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

20100123222 is a wasteful number, since it uses less digits than its factorization.

20100123222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179503.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20100123222 its reverse (22232100102), we get a palindrome (42332223324).

The spelling of 20100123222 in words is "twenty billion, one hundred million, one hundred twenty-three thousand, two hundred twenty-two".