222121121010 has 16 divisors (see below), whose sum is σ = 533090690496. Its totient is φ = 59232298928.

The previous prime is 222121120999. The next prime is 222121121011. The reversal of 222121121010 is 10121121222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (222121121011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3702018654 + ... + 3702018713.

It is an arithmetic number, because the mean of its divisors is an integer number (33318168156).

Almost surely, 2^222121121010 is an apocalyptic number.

222121121010 is an abundant number, since it is smaller than the sum of its proper divisors (310969569486).

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

222121121010 is a wasteful number, since it uses less digits than its factorization.

222121121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7404037377.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222121121010 its reverse (10121121222), we get a palindrome (232242242232).

The spelling of 222121121010 in words is "two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, ten".