1121211211210 has 16 divisors (see below), whose sum is σ = 2018344734792. Its totient is φ = 448447916800.

The previous prime is 1121211211177. The next prime is 1121211211217. The reversal of 1121211211210 is 121121121211.

It can be written as a sum of positive squares in 4 ways, for example, as 1120026405969 + 1184805241 = 1058313^2 + 34421^2 .

It is a super-2 number, since 2×1121211211210² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121211211217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4442011 + ... + 4687630.

Almost surely, 2^{1121211211210} is an apocalyptic number.

1121211211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1121211211210 is a deficient number, since it is larger than the sum of its proper divisors (897133523582).

1121211211210 is a wasteful number, since it uses less digits than its factorization.

1121211211210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9141929.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1121211211210 its reverse (121121121211), we get a palindrome (1242332332421).

The spelling of 1121211211210 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, two hundred ten".