20011211112020 has 24 divisors (see below), whose sum is σ = 42173093323368. Its totient is φ = 7975998732800.

The previous prime is 20011211112019. The next prime is 20011211112043. The reversal of 20011211112020 is 2021111211002.

It can be written as a sum of positive squares in 4 ways, for example, as 3158773962436 + 16852437149584 = 1777294^2 + 4105172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20011211111986 and 20011211112004.

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, 1780351241 + ... + 1780362480.

It is an arithmetic number, because the mean of its divisors is an integer number (1757212221807).

Almost surely, 2^{20011211112020} is an apocalyptic number.

20011211112020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011211112020 is an abundant number, since it is smaller than the sum of its proper divisors (22161882211348).

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

20011211112020 is a wasteful number, since it uses less digits than its factorization.

20011211112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560714011 (or 3560714009 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20011211112020 its reverse (2021111211002), we get a palindrome (22032322323022).

The spelling of 20011211112020 in words is "twenty trillion, eleven billion, two hundred eleven million, one hundred twelve thousand, twenty".