2011100123020 has 36 divisors (see below), whose sum is σ = 4304498970240. Its totient is φ = 789261913024.

The previous prime is 2011100122931. The next prime is 2011100123047. The reversal of 2011100123020 is 203210011102.

It is a super-2 number, since 2×2011100123020² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17842540 + ... + 17954899.

It is an arithmetic number, because the mean of its divisors is an integer number (119569415840).

Almost surely, 2^{2011100123020} is an apocalyptic number.

2011100123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011100123020 is an abundant number, since it is smaller than the sum of its proper divisors (2293398847220).

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

2011100123020 is a wasteful number, since it uses less digits than its factorization.

2011100123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35797554 (or 35797499 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 2011100123020 its reverse (203210011102), we get a palindrome (2214310134122).

The spelling of 2011100123020 in words is "two trillion, eleven billion, one hundred million, one hundred twenty-three thousand, twenty".