1211112102220 has 48 divisors (see below), whose sum is σ = 2602075801248. Its totient is φ = 473332055040.

The previous prime is 1211112102217. The next prime is 1211112102283. The reversal of 1211112102220 is 222012111121.

It is a junction number, because it is equal to n+sod(n) for n = 1211112102194 and 1211112102203.

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, 2114994 + ... + 2625913.

It is an arithmetic number, because the mean of its divisors is an integer number (54209912526).

Almost surely, 2^{1211112102220} is an apocalyptic number.

1211112102220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211112102220 is an abundant number, since it is smaller than the sum of its proper divisors (1390963699028).

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

1211112102220 is a wasteful number, since it uses less digits than its factorization.

1211112102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4741210 (or 4741208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211112102220 its reverse (222012111121), we get a palindrome (1433124213341).

The spelling of 1211112102220 in words is "one trillion, two hundred eleven billion, one hundred twelve million, one hundred two thousand, two hundred twenty".