2011201000020 has 72 divisors (see below), whose sum is σ = 6365888395776. Its totient is φ = 513001993152.

The previous prime is 2011200999979. The next prime is 2011201000021. The reversal of 2011201000020 is 200001021102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2011200999966 and 2011201000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011201000021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242894532 + ... + 242902811.

It is an arithmetic number, because the mean of its divisors is an integer number (88415116608).

Almost surely, 2^{2011201000020} is an apocalyptic number.

2011201000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011201000020 is an abundant number, since it is smaller than the sum of its proper divisors (4354687395756).

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

2011201000020 is a wasteful number, since it uses less digits than its factorization.

2011201000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485797381 (or 485797376 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 2011201000020 its reverse (200001021102), we get a palindrome (2211202021122).

The spelling of 2011201000020 in words is "two trillion, eleven billion, two hundred one million, twenty", and thus it is an aban number.