10011211121211 has 4 divisors (see below), whose sum is σ = 13348281494952. Its totient is φ = 6674140747472.

The previous prime is 10011211121207. The next prime is 10011211121243. The reversal of 10011211121211 is 11212111211001.

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 10011211121211 - 2² = 10011211121207 is a prime.

It is a super-2 number, since 2×10011211121211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10011211121111) 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, 1668535186866 + ... + 1668535186871.

It is an arithmetic number, because the mean of its divisors is an integer number (3337070373738).

Almost surely, 2^{10011211121211} is an apocalyptic number.

10011211121211 is a deficient number, since it is larger than the sum of its proper divisors (3337070373741).

10011211121211 is an equidigital number, since it uses as much as digits as its factorization.

10011211121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3337070373740.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 10011211121211 its reverse (11212111211001), we get a palindrome (21223322332212).

The spelling of 10011211121211 in words is "ten trillion, eleven billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".