11111001201020 has 96 divisors (see below), whose sum is σ = 27996523527168. Its totient is φ = 3621501176832.

The previous prime is 11111001200993. The next prime is 11111001201023. The reversal of 11111001201020 is 2010210011111.

It is a super-3 number, since 3×11111001201020³ (a number of 40 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111001200992 and 11111001201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111001201023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10059869 + ... + 11109588.

It is an arithmetic number, because the mean of its divisors is an integer number (291630453408).

Almost surely, 2^{11111001201020} is an apocalyptic number.

11111001201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111001201020 is an abundant number, since it is smaller than the sum of its proper divisors (16885522326148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111001201020 is a wasteful number, since it uses less digits than its factorization.

11111001201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21169659 (or 21169657 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11111001201020 its reverse (2010210011111), we get a palindrome (13121211212131).

The spelling of 11111001201020 in words is "eleven trillion, one hundred eleven billion, one million, two hundred one thousand, twenty".