1121223203100 has 1152 divisors, whose sum is σ = 4908645826560. Its totient is φ = 211994496000.

The previous prime is 1121223203099. The next prime is 1121223203123. The reversal of 1121223203100 is 13023221211.

1121223203100 is a `hidden beast` number, since 1 + 12 + 1 + 22 + 320 + 310 + 0 = 666.

It is a super-2 number, since 2×1121223203100² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 191888779 + ... + 191894621.

It is an arithmetic number, because the mean of its divisors is an integer number (4260977280).

Almost surely, 2^{1121223203100} is an apocalyptic number.

1121223203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121223203100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2454322913280).

1121223203100 is an abundant number, since it is smaller than the sum of its proper divisors (3787422623460).

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

1121223203100 is a wasteful number, since it uses less digits than its factorization.

1121223203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968 (or 5955 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1121223203100 its reverse (13023221211), we get a palindrome (1134246424311).

The spelling of 1121223203100 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-three million, two hundred three thousand, one hundred".