1211021220110 has 32 divisors (see below), whose sum is σ = 2370760836192. Its totient is φ = 442719100800.

The previous prime is 1211021220023. The next prime is 1211021220163. The reversal of 1211021220110 is 110221201121.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 46103444 + ... + 46129703.

It is an arithmetic number, because the mean of its divisors is an integer number (74086276131).

Almost surely, 2^{1211021220110} is an apocalyptic number.

1211021220110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211021220110 is a deficient number, since it is larger than the sum of its proper divisors (1159739616082).

1211021220110 is a wasteful number, since it uses less digits than its factorization.

1211021220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92233268.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211021220110 its reverse (110221201121), we get a palindrome (1321242421231).

The spelling of 1211021220110 in words is "one trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, one hundred ten".