211121011122011 has 4 divisors (see below), whose sum is σ = 214013079767592. Its totient is φ = 208228942476432.

The previous prime is 211121011121971. The next prime is 211121011122019. The reversal of 211121011122011 is 110221110121112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211121011122011 is a prime.

It is a super-2 number, since 2×211121011122011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121011122019) 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, 1446034322681 + ... + 1446034322826.

It is an arithmetic number, because the mean of its divisors is an integer number (53503269941898).

Almost surely, 2^{211121011122011} is an apocalyptic number.

211121011122011 is a deficient number, since it is larger than the sum of its proper divisors (2892068645581).

211121011122011 is an equidigital number, since it uses as much as digits as its factorization.

211121011122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892068645580.

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

Adding to 211121011122011 its reverse (110221110121112), we get a palindrome (321342121243123).

The spelling of 211121011122011 in words is "two hundred eleven trillion, one hundred twenty-one billion, eleven million, one hundred twenty-two thousand, eleven".