22121211222210 has 64 divisors (see below), whose sum is σ = 55889465902848. Its totient is φ = 5592578095104.

The previous prime is 22121211222197. The next prime is 22121211222241. The reversal of 22121211222210 is 1222211212122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141779227 + ... + 141935166.

It is an arithmetic number, because the mean of its divisors is an integer number (873272904732).

Almost surely, 2^{22121211222210} is an apocalyptic number.

22121211222210 is an abundant number, since it is smaller than the sum of its proper divisors (33768254680638).

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

22121211222210 is a wasteful number, since it uses less digits than its factorization.

22121211222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283714539.

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

Adding to 22121211222210 its reverse (1222211212122), we get a palindrome (23343422434332).

The spelling of 22121211222210 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred eleven million, two hundred twenty-two thousand, two hundred ten".