1211112203224 has 128 divisors (see below), whose sum is σ = 2889863424000. Its totient is φ = 471712792320.

The previous prime is 1211112203209. The next prime is 1211112203237. The reversal of 1211112203224 is 4223022111121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1211112203195 and 1211112203204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183304129 + ... + 183310735.

It is an arithmetic number, because the mean of its divisors is an integer number (22577058000).

Almost surely, 2^{1211112203224} is an apocalyptic number.

1211112203224 is a gapful number since it is divisible by the number (14) 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 1211112203224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444931712000).

1211112203224 is an abundant number, since it is smaller than the sum of its proper divisors (1678751220776).

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

1211112203224 is a wasteful number, since it uses less digits than its factorization.

1211112203224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12718 (or 12700 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 1211112203224 its reverse (4223022111121), we get a palindrome (5434134314345).

The spelling of 1211112203224 in words is "one trillion, two hundred eleven billion, one hundred twelve million, two hundred three thousand, two hundred twenty-four".