1221010122 has 8 divisors (see below), whose sum is σ = 2442020256. Its totient is φ = 407003372.

The previous prime is 1221010117. The next prime is 1221010123. The reversal of 1221010122 is 2210101221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221010122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1221010098 and 1221010107.

It is not an unprimeable number, because it can be changed into a prime (1221010123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101750838 + ... + 101750849.

It is an arithmetic number, because the mean of its divisors is an integer number (305252532).

Almost surely, 2^1221010122 is an apocalyptic number.

1221010122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1221010122 is a wasteful number, since it uses less digits than its factorization.

1221010122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203501692.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1221010122 is about 34942.9552556735. The cubic root of 1221010122 is about 1068.8245519076.

Adding to 1221010122 its reverse (2210101221), we get a palindrome (3431111343).

The spelling of 1221010122 in words is "one billion, two hundred twenty-one million, ten thousand, one hundred twenty-two".