1111001201020 has 48 divisors (see below), whose sum is σ = 2408497152768. Its totient is φ = 430041185280.

The previous prime is 1111001201003. The next prime is 1111001201039. The reversal of 1111001201020 is 201021001111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1111001200988 and 1111001201006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14701572 + ... + 14776948.

It is an arithmetic number, because the mean of its divisors is an integer number (50177024016).

Almost surely, 2^{1111001201020} is an apocalyptic number.

1111001201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111001201020 is an abundant number, since it is smaller than the sum of its proper divisors (1297495951748).

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

1111001201020 is a wasteful number, since it uses less digits than its factorization.

1111001201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99190 (or 99188 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1111001201020 its reverse (201021001111), we get a palindrome (1312022202131).

The spelling of 1111001201020 in words is "one trillion, one hundred eleven billion, one million, two hundred one thousand, twenty".