1021220442311 has 16 divisors (see below), whose sum is σ = 1032932476800. Its totient is φ = 1009558437888.

The previous prime is 1021220442259. The next prime is 1021220442329. The reversal of 1021220442311 is 1132440221201.

It is a cyclic number.

It is not a de Polignac number, because 1021220442311 - 2²² = 1021216248007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021220442391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85316135 + ... + 85328103.

It is an arithmetic number, because the mean of its divisors is an integer number (64558279800).

Almost surely, 2^{1021220442311} is an apocalyptic number.

1021220442311 is a deficient number, since it is larger than the sum of its proper divisors (11712034489).

1021220442311 is a wasteful number, since it uses less digits than its factorization.

1021220442311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13978.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1021220442311 its reverse (1132440221201), we get a palindrome (2153660663512).

The spelling of 1021220442311 in words is "one trillion, twenty-one billion, two hundred twenty million, four hundred forty-two thousand, three hundred eleven".