1221123162 has 32 divisors (see below), whose sum is σ = 2817234432. Its totient is φ = 345630384.

The previous prime is 1221123157. The next prime is 1221123191. The reversal of 1221123162 is 2613211221.

It is a super-2 number, since 2×1221123162² = 2982283553545756488, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

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, 131368 + ... + 140355.

It is an arithmetic number, because the mean of its divisors is an integer number (88038576).

Almost surely, 2^1221123162 is an apocalyptic number.

1221123162 is an abundant number, since it is smaller than the sum of its proper divisors (1596111270).

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

1221123162 is a wasteful number, since it uses less digits than its factorization.

1221123162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271842.

The product of its digits is 288, while the sum is 21.

The square root of 1221123162 is about 34944.5727116529. The cubic root of 1221123162 is about 1068.8575344895.

Adding to 1221123162 its reverse (2613211221), we get a palindrome (3834334383).

The spelling of 1221123162 in words is "one billion, two hundred twenty-one million, one hundred twenty-three thousand, one hundred sixty-two".