1211122201010 has 16 divisors (see below), whose sum is σ = 2180035474200. Its totient is φ = 484445433216.

The previous prime is 1211122200863. The next prime is 1211122201019. The reversal of 1211122201010 is 101022211121.

It can be written as a sum of positive squares in 4 ways, for example, as 823579845169 + 387542355841 = 907513^2 + 622529^2 .

It is not an unprimeable number, because it can be changed into a prime (1211122201019) 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, 1425596 + ... + 2110584.

Almost surely, 2^{1211122201010} is an apocalyptic number.

1211122201010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211122201010 is a deficient number, since it is larger than the sum of its proper divisors (968913273190).

1211122201010 is a wasteful number, since it uses less digits than its factorization.

1211122201010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861805.

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

Adding to 1211122201010 its reverse (101022211121), we get a palindrome (1312144412131).

It can be divided in two parts, 1211 and 122201010, that added together give a palindrome (122202221).

The spelling of 1211122201010 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred one thousand, ten".