1221020122313 has 16 divisors (see below), whose sum is σ = 1280094580800. Its totient is φ = 1163663128320.

The previous prime is 1221020122307. The next prime is 1221020122327. The reversal of 1221020122313 is 3132210201221.

It is not a de Polignac number, because 1221020122313 - 2¹² = 1221020118217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221020182313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1712903 + ... + 2318636.

It is an arithmetic number, because the mean of its divisors is an integer number (80005911300).

Almost surely, 2^{1221020122313} is an apocalyptic number.

It is an amenable number.

1221020122313 is a deficient number, since it is larger than the sum of its proper divisors (59074458487).

1221020122313 is an equidigital number, since it uses as much as digits as its factorization.

1221020122313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4031752.

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

Adding to 1221020122313 its reverse (3132210201221), we get a palindrome (4353230323534).

The spelling of 1221020122313 in words is "one trillion, two hundred twenty-one billion, twenty million, one hundred twenty-two thousand, three hundred thirteen".