1122222121000 has 64 divisors (see below), whose sum is σ = 2632065443280. Its totient is φ = 447851980800.

The previous prime is 1122222120979. The next prime is 1122222121037. The reversal of 1122222121000 is 1212222211.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 53037168804 + 1069184952196 = 230298^2 + 1034014^2 .

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, 862869 + ... + 1728868.

Almost surely, 2^{1122222121000} is an apocalyptic number.

1122222121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122222121000 is an abundant number, since it is smaller than the sum of its proper divisors (1509843322280).

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

1122222121000 is a wasteful number, since it uses less digits than its factorization.

1122222121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592191 (or 2592177 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1122222121000 its reverse (1212222211), we get a palindrome (1123434343211).

The spelling of 1122222121000 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-one thousand".