1211222120022 has 24 divisors (see below), whose sum is σ = 2640029058576. Its totient is φ = 401323096656.

The previous prime is 1211222120011. The next prime is 1211222120023. The reversal of 1211222120022 is 2200212221121.

It is a happy number.

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 = 1211222119977 and 1211222120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211222120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201464413 + ... + 201470424.

It is an arithmetic number, because the mean of its divisors is an integer number (110001210774).

Almost surely, 2^{1211222120022} is an apocalyptic number.

1211222120022 is an abundant number, since it is smaller than the sum of its proper divisors (1428806938554).

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

1211222120022 is a wasteful number, since it uses less digits than its factorization.

1211222120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402935012 (or 402935009 counting only the distinct ones).

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

Adding to 1211222120022 its reverse (2200212221121), we get a palindrome (3411434341143).

The spelling of 1211222120022 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, twenty-two".