1122202021 has 12 divisors (see below), whose sum is σ = 1161945540. Its totient is φ = 1083171840.

The previous prime is 1122202001. The next prime is 1122202043. The reversal of 1122202021 is 1202022211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 17969121 + 1104232900 = 4239^2 + 33230^2 .

It is not a de Polignac number, because 1122202021 - 2¹³ = 1122193829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1122201992 and 1122202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1122202001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384315 + ... + 387223.

It is an arithmetic number, because the mean of its divisors is an integer number (96828795).

Almost surely, 2^1122202021 is an apocalyptic number.

It is an amenable number.

1122202021 is a deficient number, since it is larger than the sum of its proper divisors (39743519).

1122202021 is an frugal number, since it uses more digits than its factorization.

1122202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144 (or 3047 counting only the distinct ones).

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

The square root of 1122202021 is about 33499.2838878684. The cubic root of 1122202021 is about 1039.1789689307.

Adding to 1122202021 its reverse (1202022211), we get a palindrome (2324224232).

The spelling of 1122202021 in words is "one billion, one hundred twenty-two million, two hundred two thousand, twenty-one".