1211210100011 has 4 divisors (see below), whose sum is σ = 1215815461872. Its totient is φ = 1206604738152.

The previous prime is 1211210099999. The next prime is 1211210100017. The reversal of 1211210100011 is 1100010121121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211210100011 - 2¹⁴ = 1211210083627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211210099965 and 1211210100001.

It is not an unprimeable number, because it can be changed into a prime (1211210100017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2302680536 + ... + 2302681061.

It is an arithmetic number, because the mean of its divisors is an integer number (303953865468).

Almost surely, 2^{1211210100011} is an apocalyptic number.

1211210100011 is a deficient number, since it is larger than the sum of its proper divisors (4605361861).

1211210100011 is an equidigital number, since it uses as much as digits as its factorization.

1211210100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4605361860.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1211210100011 its reverse (1100010121121), we get a palindrome (2311220221132).

The spelling of 1211210100011 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred thousand, eleven".