1220242100311 has 4 divisors (see below), whose sum is σ = 1314106877272. Its totient is φ = 1126377323352.

The previous prime is 1220242100267. The next prime is 1220242100317. The reversal of 1220242100311 is 1130012420221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220242100311 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 (1220242100317) 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 3 ways as a sum of consecutive naturals, for example, 46932388461 + ... + 46932388486.

It is an arithmetic number, because the mean of its divisors is an integer number (328526719318).

Almost surely, 2^{1220242100311} is an apocalyptic number.

1220242100311 is a deficient number, since it is larger than the sum of its proper divisors (93864776961).

1220242100311 is an equidigital number, since it uses as much as digits as its factorization.

1220242100311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93864776960.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 1220242100311 its reverse (1130012420221), we get a palindrome (2350254520532).

The spelling of 1220242100311 in words is "one trillion, two hundred twenty billion, two hundred forty-two million, one hundred thousand, three hundred eleven".