211211001011 has 4 divisors (see below), whose sum is σ = 212475737712. Its totient is φ = 209946264312.

The previous prime is 211211000999. The next prime is 211211001091. The reversal of 211211001011 is 110100112112.

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 211211001011 - 2¹⁸ = 211210738867 is a prime.

It is a super-2 number, since 2×211211001011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211211000983 and 211211001001.

It is not an unprimeable number, because it can be changed into a prime (211211001091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632368100 + ... + 632368433.

It is an arithmetic number, because the mean of its divisors is an integer number (53118934428).

Almost surely, 2^211211001011 is an apocalyptic number.

211211001011 is a deficient number, since it is larger than the sum of its proper divisors (1264736701).

211211001011 is a wasteful number, since it uses less digits than its factorization.

211211001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264736700.

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

Adding to 211211001011 its reverse (110100112112), we get a palindrome (321311113123).

The spelling of 211211001011 in words is "two hundred eleven billion, two hundred eleven million, one thousand, eleven".