1221331020122 has 16 divisors (see below), whose sum is σ = 1876690931712. Its totient is φ = 595925028720.

The previous prime is 1221331020109. The next prime is 1221331020131. The reversal of 1221331020122 is 2210201331221.

It is a junction number, because it is equal to n+sod(n) for n = 1221331020094 and 1221331020103.

It is an unprimeable number.

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, 39397538 + ... + 39428525.

It is an arithmetic number, because the mean of its divisors is an integer number (117293183232).

Almost surely, 2^{1221331020122} is an apocalyptic number.

1221331020122 is a deficient number, since it is larger than the sum of its proper divisors (655359911590).

1221331020122 is a wasteful number, since it uses less digits than its factorization.

1221331020122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78826253.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1221331020122 its reverse (2210201331221), we get a palindrome (3431532351343).

The spelling of 1221331020122 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, twenty thousand, one hundred twenty-two".