10111212211211 has 4 divisors (see below), whose sum is σ = 10179072696000. Its totient is φ = 10043351726424.

The previous prime is 10111212211201. The next prime is 10111212211277. The reversal of 10111212211211 is 11211221211101.

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 10111212211211 - 2⁴² = 5713165700107 is a prime.

It is a super-2 number, since 2×10111212211211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10111212211211.

It is not an unprimeable number, because it can be changed into a prime (10111212211201) 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 3 ways as a sum of consecutive naturals, for example, 33930242171 + ... + 33930242468.

It is an arithmetic number, because the mean of its divisors is an integer number (2544768174000).

Almost surely, 2^{10111212211211} is an apocalyptic number.

10111212211211 is a deficient number, since it is larger than the sum of its proper divisors (67860484789).

10111212211211 is an equidigital number, since it uses as much as digits as its factorization.

10111212211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67860484788.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 10111212211211 its reverse (11211221211101), we get a palindrome (21322433422312).

The spelling of 10111212211211 in words is "ten trillion, one hundred eleven billion, two hundred twelve million, two hundred eleven thousand, two hundred eleven".