1111221121000 has 64 divisors (see below), whose sum is σ = 2600585844480. Its totient is φ = 444432308800.

The previous prime is 1111221120979. The next prime is 1111221121057. The reversal of 1111221121000 is 1211221111.

It is a happy number.

It is a super-3 number, since 3×1111221121000³ (a number of 37 digits) contains 333 as substring.

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, 8357037 + ... + 8488963.

It is an arithmetic number, because the mean of its divisors is an integer number (40634153820).

Almost surely, 2^{1111221121000} is an apocalyptic number.

1111221121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111221121000 is an abundant number, since it is smaller than the sum of its proper divisors (1489364723480).

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

1111221121000 is a wasteful number, since it uses less digits than its factorization.

1111221121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140371 (or 140357 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1111221121000 its reverse (1211221111), we get a palindrome (1112432342111).

The spelling of 1111221121000 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand".