1222122221010 has 96 divisors (see below), whose sum is σ = 3216834045360. Its totient is φ = 321882624000.

The previous prime is 1222122220967. The next prime is 1222122221027. The reversal of 1222122221010 is 101222212221.

It is a happy number.

1222122221010 is a `hidden beast` number, since 1 + 2 + 221 + 222 + 210 + 10 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 1038998991969 + 183123229041 = 1019313^2 + 427929^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3553450 + ... + 3882170.

Almost surely, 2^{1222122221010} is an apocalyptic number.

1222122221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222122221010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608417022680).

1222122221010 is an abundant number, since it is smaller than the sum of its proper divisors (1994711824350).

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

1222122221010 is a wasteful number, since it uses less digits than its factorization.

1222122221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329244 (or 329241 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222122221010 its reverse (101222212221), we get a palindrome (1323344433231).

The spelling of 1222122221010 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred twenty-one thousand, ten".