1211202210222 has 24 divisors (see below), whose sum is σ = 2653757655120. Its totient is φ = 399197731680.

The previous prime is 1211202210221. The next prime is 1211202210233. The reversal of 1211202210222 is 2220122021121.

It is a happy number.

1211202210222 is a `hidden beast` number, since 1 + 211 + 20 + 2 + 210 + 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 = 1211202210195 and 1211202210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211202210221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 378026554 + ... + 378029757.

It is an arithmetic number, because the mean of its divisors is an integer number (110573235630).

Almost surely, 2^{1211202210222} is an apocalyptic number.

1211202210222 is an abundant number, since it is smaller than the sum of its proper divisors (1442555444898).

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

1211202210222 is a wasteful number, since it uses less digits than its factorization.

1211202210222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756056408 (or 756056405 counting only the distinct ones).

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

Adding to 1211202210222 its reverse (2220122021121), we get a palindrome (3431324231343).

The spelling of 1211202210222 in words is "one trillion, two hundred eleven billion, two hundred two million, two hundred ten thousand, two hundred twenty-two".