2011201021020 has 24 divisors (see below), whose sum is σ = 5631362859024. Its totient is φ = 536320272256.

The previous prime is 2011201021013. The next prime is 2011201021043. The reversal of 2011201021020 is 201201021102.

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 = 2011201020987 and 2011201021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16760008449 + ... + 16760008568.

It is an arithmetic number, because the mean of its divisors is an integer number (234640119126).

Almost surely, 2^{2011201021020} is an apocalyptic number.

2011201021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011201021020 is an abundant number, since it is smaller than the sum of its proper divisors (3620161838004).

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

2011201021020 is a wasteful number, since it uses less digits than its factorization.

2011201021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520017029 (or 33520017027 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2011201021020 its reverse (201201021102), we get a palindrome (2212402042122).

The spelling of 2011201021020 in words is "two trillion, eleven billion, two hundred one million, twenty-one thousand, twenty".