1221010012222 has 256 divisors, whose sum is σ = 2668387276800. Its totient is φ = 411505920000.

The previous prime is 1221010012213. The next prime is 1221010012289. The reversal of 1221010012222 is 2222100101221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1221010012196 and 1221010012205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 418582708 + ... + 418585624.

It is an arithmetic number, because the mean of its divisors is an integer number (10423387800).

Almost surely, 2^{1221010012222} is an apocalyptic number.

1221010012222 is an abundant number, since it is smaller than the sum of its proper divisors (1447377264578).

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

1221010012222 is a wasteful number, since it uses less digits than its factorization.

1221010012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232 (or 3218 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1221010012222 its reverse (2222100101221), we get a palindrome (3443110113443).

The spelling of 1221010012222 in words is "one trillion, two hundred twenty-one billion, ten million, twelve thousand, two hundred twenty-two".