1021122196 has 6 divisors (see below), whose sum is σ = 1786963850. Its totient is φ = 510561096.

The previous prime is 1021122173. The next prime is 1021122197. The reversal of 1021122196 is 6912211201.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 725763600 + 295358596 = 26940^2 + 17186^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1021122196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021122197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127640271 + ... + 127640278.

Almost surely, 2^1021122196 is an apocalyptic number.

It is an amenable number.

1021122196 is a deficient number, since it is larger than the sum of its proper divisors (765841654).

1021122196 is a wasteful number, since it uses less digits than its factorization.

1021122196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255280553 (or 255280551 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 1021122196 is about 31955.0026756375. The cubic root of 1021122196 is about 1006.9917337307.

Adding to 1021122196 its reverse (6912211201), we get a palindrome (7933333397).

The spelling of 1021122196 in words is "one billion, twenty-one million, one hundred twenty-two thousand, one hundred ninety-six".