1211101011010 has 16 divisors (see below), whose sum is σ = 2378161985472. Its totient is φ = 440400367600.

The previous prime is 1211101010993. The next prime is 1211101011017. The reversal of 1211101011010 is 101101011121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1211101011017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5505004486 + ... + 5505004705.

It is an arithmetic number, because the mean of its divisors is an integer number (148635124092).

Almost surely, 2^{1211101011010} is an apocalyptic number.

1211101011010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211101011010 is a deficient number, since it is larger than the sum of its proper divisors (1167060974462).

1211101011010 is a wasteful number, since it uses less digits than its factorization.

1211101011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11010009209.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1211101011010 its reverse (101101011121), we get a palindrome (1312202022131).

The spelling of 1211101011010 in words is "one trillion, two hundred eleven billion, one hundred one million, eleven thousand, ten".