1220001221122 has 16 divisors (see below), whose sum is σ = 1831723882560. Its totient is φ = 609426718992.

The previous prime is 1220001221093. The next prime is 1220001221123. The reversal of 1220001221122 is 2211221000221.

It is a happy number.

It is a super-2 number, since 2×1220001221122² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1220001221096 and 1220001221105.

It is not an unprimeable number, because it can be changed into a prime (1220001221123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23502148 + ... + 23554000.

It is an arithmetic number, because the mean of its divisors is an integer number (114482742660).

Almost surely, 2^{1220001221122} is an apocalyptic number.

1220001221122 is a deficient number, since it is larger than the sum of its proper divisors (611722661438).

1220001221122 is a wasteful number, since it uses less digits than its factorization.

1220001221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62697.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220001221122 its reverse (2211221000221), we get a palindrome (3431222221343).

The spelling of 1220001221122 in words is "one trillion, two hundred twenty billion, one million, two hundred twenty-one thousand, one hundred twenty-two".