22222121121210 has 16 divisors (see below), whose sum is σ = 53333090690976. Its totient is φ = 5925898965648.

The previous prime is 22222121121199. The next prime is 22222121121229. The reversal of 22222121121210 is 1212112122222.

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, 370368685324 + ... + 370368685383.

It is an arithmetic number, because the mean of its divisors is an integer number (3333318168186).

Almost surely, 2^{22222121121210} is an apocalyptic number.

22222121121210 is an abundant number, since it is smaller than the sum of its proper divisors (31110969569766).

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

22222121121210 is a wasteful number, since it uses less digits than its factorization.

22222121121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740737370717.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 22222121121210 its reverse (1212112122222), we get a palindrome (23434233243432).

The spelling of 22222121121210 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".