201111101010 has 48 divisors (see below), whose sum is σ = 550409333760. Its totient is φ = 50807014560.

The previous prime is 201111100987. The next prime is 201111101083. The reversal of 201111101010 is 10101111102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 201111100983 and 201111101001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58802706 + ... + 58806125.

It is an arithmetic number, because the mean of its divisors is an integer number (11466861120).

Almost surely, 2^201111101010 is an apocalyptic number.

201111101010 is an abundant number, since it is smaller than the sum of its proper divisors (349298232750).

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

201111101010 is a wasteful number, since it uses less digits than its factorization.

201111101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117608863 (or 117608860 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 201111101010 its reverse (10101111102), we get a palindrome (211212212112).

The spelling of 201111101010 in words is "two hundred one billion, one hundred eleven million, one hundred one thousand, ten".