201111210020 has 48 divisors (see below), whose sum is σ = 482713717248. Its totient is φ = 68945727360.

The previous prime is 201111209977. The next prime is 201111210031. The reversal of 201111210020 is 20012111102.

It is a junction number, because it is equal to n+sod(n) for n = 201111209983 and 201111210010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1505765 + ... + 1633875.

It is an arithmetic number, because the mean of its divisors is an integer number (10056535776).

Almost surely, 2^201111210020 is an apocalyptic number.

201111210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111210020 is an abundant number, since it is smaller than the sum of its proper divisors (281602507228).

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

201111210020 is a wasteful number, since it uses less digits than its factorization.

201111210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139340 (or 139338 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201111210020 its reverse (20012111102), we get a palindrome (221123321122).

The spelling of 201111210020 in words is "two hundred one billion, one hundred eleven million, two hundred ten thousand, twenty".