1222311000 has 64 divisors (see below), whose sum is σ = 3813619680. Its totient is φ = 325948800.

The previous prime is 1222310977. The next prime is 1222311017. The reversal of 1222311000 is 1132221.

1222311000 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 200719 + ... + 206718.

Almost surely, 2^1222311000 is an apocalyptic number.

1222311000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222311000 is an abundant number, since it is smaller than the sum of its proper divisors (2591308680).

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

1222311000 is a wasteful number, since it uses less digits than its factorization.

1222311000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407461 (or 407447 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1222311000 is about 34961.5646102974. The cubic root of 1222311000 is about 1069.2039964418.

Adding to 1222311000 its reverse (1132221), we get a palindrome (1223443221).

The spelling of 1222311000 in words is "one billion, two hundred twenty-two million, three hundred eleven thousand".