1211312212010 has 16 divisors (see below), whose sum is σ = 2308618569096. Its totient is φ = 456023420928.

The previous prime is 1211312212007. The next prime is 1211312212021. The reversal of 1211312212010 is 102122131121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1208212060969 + 3100151041 = 1099187^2 + 55679^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1211312212010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3562682807 + ... + 3562683146.

Almost surely, 2^{1211312212010} is an apocalyptic number.

1211312212010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211312212010 is a deficient number, since it is larger than the sum of its proper divisors (1097306357086).

1211312212010 is a wasteful number, since it uses less digits than its factorization.

1211312212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7125365977.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211312212010 its reverse (102122131121), we get a palindrome (1313434343131).

The spelling of 1211312212010 in words is "one trillion, two hundred eleven billion, three hundred twelve million, two hundred twelve thousand, ten".