2011220021020 has 96 divisors (see below), whose sum is σ = 5333076661248. Its totient is φ = 620781376512.

The previous prime is 2011220021017. The next prime is 2011220021029. The reversal of 2011220021020 is 201200221102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011220021029) 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, 18315922 + ... + 18425401.

It is an arithmetic number, because the mean of its divisors is an integer number (55552881888).

Almost surely, 2^{2011220021020} is an apocalyptic number.

2011220021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011220021020 is an abundant number, since it is smaller than the sum of its proper divisors (3321856640228).

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

2011220021020 is a wasteful number, since it uses less digits than its factorization.

2011220021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36741379 (or 36741377 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2011220021020 its reverse (201200221102), we get a palindrome (2212420242122).

The spelling of 2011220021020 in words is "two trillion, eleven billion, two hundred twenty million, twenty-one thousand, twenty".