1123220154 has 32 divisors (see below), whose sum is σ = 2569944960. Its totient is φ = 320596992.

The previous prime is 1123220099. The next prime is 1123220177. The reversal of 1123220154 is 4510223211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1123220154.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30442 + ... + 56330.

It is an arithmetic number, because the mean of its divisors is an integer number (80310780).

Almost surely, 2^1123220154 is an apocalyptic number.

1123220154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1123220154 is an abundant number, since it is smaller than the sum of its proper divisors (1446724806).

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

1123220154 is a wasteful number, since it uses less digits than its factorization.

1123220154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26934.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1123220154 is about 33514.4767824294. The cubic root of 1123220154 is about 1039.4931436735.

Adding to 1123220154 its reverse (4510223211), we get a palindrome (5633443365).

The spelling of 1123220154 in words is "one billion, one hundred twenty-three million, two hundred twenty thousand, one hundred fifty-four".