1121022231 has 64 divisors (see below), whose sum is σ = 1859051520. Its totient is φ = 586776960.

The previous prime is 1121022223. The next prime is 1121022247. The reversal of 1121022231 is 1322201211.

It is not a de Polignac number, because 1121022231 - 2³ = 1121022223 is a prime.

It is a super-2 number, since 2×1121022231² = 2513381684792434722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121022231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121022271) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2282896 + ... + 2283386.

It is an arithmetic number, because the mean of its divisors is an integer number (29047680).

Almost surely, 2^1121022231 is an apocalyptic number.

1121022231 is a deficient number, since it is larger than the sum of its proper divisors (738029289).

1121022231 is a wasteful number, since it uses less digits than its factorization.

1121022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1121022231 is about 33481.6700748335. The cubic root of 1121022231 is about 1038.8146724176.

Adding to 1121022231 its reverse (1322201211), we get a palindrome (2443223442).

It can be divided in two parts, 1121022 and 231, that added together give a triangular number (1121253 = T₁₄₉₇).

The spelling of 1121022231 in words is "one billion, one hundred twenty-one million, twenty-two thousand, two hundred thirty-one".