11111010101010 has 40 divisors (see below), whose sum is σ = 29876271607116. Its totient is φ = 2962936026720.

The previous prime is 11111010100969. The next prime is 11111010101011. The reversal of 11111010101010 is 1010101011111.

It can be written as a sum of positive squares in 2 ways, for example, as 9149965561881 + 1961044539129 = 3024891^2 + 1400373^2 .

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

11111010101010 is a modest number, since divided by 10101010 gives 111110 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11111010100983 and 11111010101001.

It is not an unprimeable number, because it can be changed into a prime (11111010101011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6858647401 + ... + 6858649020.

Almost surely, 2^{11111010101010} is an apocalyptic number.

11111010101010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111010101010 is an abundant number, since it is smaller than the sum of its proper divisors (18765261506106).

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

11111010101010 is a wasteful number, since it uses less digits than its factorization.

11111010101010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13717296440 (or 13717296431 counting only the distinct ones).

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

Adding to 11111010101010 its reverse (1010101011111), we get a palindrome (12121111112121).

The spelling of 11111010101010 in words is "eleven trillion, one hundred eleven billion, ten million, one hundred one thousand, ten".