1021220122 has 16 divisors (see below), whose sum is σ = 1672900992. Its totient is φ = 464693040.

The previous prime is 1021220119. The next prime is 1021220129. The reversal of 1021220122 is 2210221201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (1021220129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274758 + ... + 278449.

It is an arithmetic number, because the mean of its divisors is an integer number (104556312).

Almost surely, 2^1021220122 is an apocalyptic number.

1021220122 is a deficient number, since it is larger than the sum of its proper divisors (651680870).

1021220122 is a wasteful number, since it uses less digits than its factorization.

1021220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553293.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1021220122 is about 31956.5348872496. The cubic root of 1021220122 is about 1007.0239229962.

Adding to 1021220122 its reverse (2210221201), we get a palindrome (3231441323).

The spelling of 1021220122 in words is "one billion, twenty-one million, two hundred twenty thousand, one hundred twenty-two".