2011111201020 has 48 divisors (see below), whose sum is σ = 5632673131008. Its totient is φ = 536147580480.

The previous prime is 2011111200991. The next prime is 2011111201049. The reversal of 2011111201020 is 201021111102.

It is an interprime number because it is at equal distance from previous prime (2011111200991) and next prime (2011111201049).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2011111200987 and 2011111201005.

It is a congruent number.

It is an unprimeable number.

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, 4429896 + ... + 4862735.

It is an arithmetic number, because the mean of its divisors is an integer number (117347356896).

Almost surely, 2^{2011111201020} is an apocalyptic number.

2011111201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011111201020 is an abundant number, since it is smaller than the sum of its proper divisors (3621561929988).

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

2011111201020 is a wasteful number, since it uses less digits than its factorization.

2011111201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296250 (or 9296248 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2011111201020 its reverse (201021111102), we get a palindrome (2212132312122).

The spelling of 2011111201020 in words is "two trillion, eleven billion, one hundred eleven million, two hundred one thousand, twenty".