1002111212211 has 4 divisors (see below), whose sum is σ = 1336148282952. Its totient is φ = 668074141472.

The previous prime is 1002111212183. The next prime is 1002111212227. The reversal of 1002111212211 is 1122121112001.

It is a happy number.

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 1002111212211 - 2¹⁰ = 1002111211187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1002111212281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 167018535366 + ... + 167018535371.

It is an arithmetic number, because the mean of its divisors is an integer number (334037070738).

Almost surely, 2^{1002111212211} is an apocalyptic number.

1002111212211 is a deficient number, since it is larger than the sum of its proper divisors (334037070741).

1002111212211 is an equidigital number, since it uses as much as digits as its factorization.

1002111212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334037070740.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1002111212211 its reverse (1122121112001), we get a palindrome (2124232324212).

The spelling of 1002111212211 in words is "one trillion, two billion, one hundred eleven million, two hundred twelve thousand, two hundred eleven".