111101010101010 has 96 divisors (see below), whose sum is σ = 296678290280112. Its totient is φ = 28825375703040.

The previous prime is 111101010100903. The next prime is 111101010101021. The reversal of 111101010101010 is 10101010101111.

It can be written as a sum of positive squares in 8 ways, for example, as 67470929536761 + 43630080564249 = 8214069^2 + 6605307^2 .

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

111101010101010 is a modest number, since divided by 10101010 gives 1111010 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 111101010100983 and 111101010101001.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 119339730 + ... + 120267090.

Almost surely, 2^{111101010101010} is an apocalyptic number.

111101010101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111101010101010 is an abundant number, since it is smaller than the sum of its proper divisors (185577280179102).

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

111101010101010 is a wasteful number, since it uses less digits than its factorization.

111101010101010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963388 (or 963385 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111101010101010 its reverse (10101010101111), we get a palindrome (121202020202121).

The spelling of 111101010101010 in words is "one hundred eleven trillion, one hundred one billion, ten million, one hundred one thousand, ten".