11220121431311 has 4 divisors (see below), whose sum is σ = 12083207695272. Its totient is φ = 10357035167352.

The previous prime is 11220121431251. The next prime is 11220121431367. The reversal of 11220121431311 is 11313412102211.

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

It is a cyclic number.

It is not a de Polignac number, because 11220121431311 - 2⁴² = 6822074920207 is a prime.

It is a super-2 number, since 2×11220121431311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220121431611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431543131961 + ... + 431543131986.

It is an arithmetic number, because the mean of its divisors is an integer number (3020801923818).

Almost surely, 2^{11220121431311} is an apocalyptic number.

11220121431311 is a deficient number, since it is larger than the sum of its proper divisors (863086263961).

11220121431311 is an equidigital number, since it uses as much as digits as its factorization.

11220121431311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863086263960.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 11220121431311 its reverse (11313412102211), we get a palindrome (22533533533522).

The spelling of 11220121431311 in words is "eleven trillion, two hundred twenty billion, one hundred twenty-one million, four hundred thirty-one thousand, three hundred eleven".