1021221222 has 16 divisors (see below), whose sum is σ = 2334220032. Its totient is φ = 291777480.

The previous prime is 1021221203. The next prime is 1021221239. The reversal of 1021221222 is 2221221201.

It is a congruent number.

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, 12157354 + ... + 12157437.

It is an arithmetic number, because the mean of its divisors is an integer number (145888752).

Almost surely, 2^1021221222 is an apocalyptic number.

1021221222 is an abundant number, since it is smaller than the sum of its proper divisors (1312998810).

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

1021221222 is a wasteful number, since it uses less digits than its factorization.

1021221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24314803.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1021221222 is about 31956.5520981222. The cubic root of 1021221222 is about 1007.0242845656.

Adding to 1021221222 its reverse (2221221201), we get a palindrome (3242442423).

The spelling of 1021221222 in words is "one billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".