1220121212022 has 12 divisors (see below), whose sum is σ = 2643595959420. Its totient is φ = 406707070668.

The previous prime is 1220121212021. The next prime is 1220121212039. The reversal of 1220121212022 is 2202121210221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67784511779 = 1220121212022 / (1 + 2 + 2 + 0 + 1 + 2 + 1 + 2 + 1 + 2 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1220121211986 and 1220121212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220121212021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33892255872 + ... + 33892255907.

It is an arithmetic number, because the mean of its divisors is an integer number (220299663285).

Almost surely, 2^{1220121212022} is an apocalyptic number.

1220121212022 is an abundant number, since it is smaller than the sum of its proper divisors (1423474747398).

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

1220121212022 is a wasteful number, since it uses less digits than its factorization.

1220121212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67784511787 (or 67784511784 counting only the distinct ones).

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

Adding to 1220121212022 its reverse (2202121210221), we get a palindrome (3422242422243).

The spelling of 1220121212022 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twelve thousand, twenty-two".