1211100220224 has 112 divisors (see below), whose sum is σ = 3636164025600. Its totient is φ = 395110683648.

The previous prime is 1211100220223. The next prime is 1211100220261. The reversal of 1211100220224 is 4220220011121.

1211100220224 is a `hidden beast` number, since 1 + 211 + 10 + 0 + 220 + 224 = 666.

It is a super-2 number, since 2×1211100220224² (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 junction number, because it is equal to n+sod(n) for n = 1211100220197 and 1211100220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7374829 + ... + 7537260.

Almost surely, 2^{1211100220224} is an apocalyptic number.

It is an amenable number.

1211100220224 is an abundant number, since it is smaller than the sum of its proper divisors (2425063805376).

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

1211100220224 is a wasteful number, since it uses less digits than its factorization.

1211100220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14912157 (or 14912141 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1211100220224 its reverse (4220220011121), we get a palindrome (5431320231345).

The spelling of 1211100220224 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred twenty thousand, two hundred twenty-four".