1220211012222 has 96 divisors (see below), whose sum is σ = 2887309724832. Its totient is φ = 370865682432.

The previous prime is 1220211012217. The next prime is 1220211012233. The reversal of 1220211012222 is 2222101120221.

It is a happy number.

1220211012222 is a `hidden beast` number, since 1 + 220 + 211 + 0 + 12 + 222 = 666.

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 = 1220211012195 and 1220211012204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2406753 + ... + 2869299.

It is an arithmetic number, because the mean of its divisors is an integer number (30076142967).

Almost surely, 2^{1220211012222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220211012222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1443654862416).

1220211012222 is an abundant number, since it is smaller than the sum of its proper divisors (1667098712610).

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

1220211012222 is a wasteful number, since it uses less digits than its factorization.

1220211012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462842 (or 462839 counting only the distinct ones).

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

Adding to 1220211012222 its reverse (2222101120221), we get a palindrome (3442312132443).

The spelling of 1220211012222 in words is "one trillion, two hundred twenty billion, two hundred eleven million, twelve thousand, two hundred twenty-two".