211310012011 has 4 divisors (see below), whose sum is σ = 241497156592. Its totient is φ = 181122867432.

The previous prime is 211310011937. The next prime is 211310012029. The reversal of 211310012011 is 110210013112.

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 211310012011 - 2²¹ = 211307914859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211310011982 and 211310012000.

It is not an unprimeable number, because it can be changed into a prime (211310012311) 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, 15093572280 + ... + 15093572293.

It is an arithmetic number, because the mean of its divisors is an integer number (60374289148).

Almost surely, 2^211310012011 is an apocalyptic number.

211310012011 is a deficient number, since it is larger than the sum of its proper divisors (30187144581).

211310012011 is an equidigital number, since it uses as much as digits as its factorization.

211310012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30187144580.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 211310012011 its reverse (110210013112), we get a palindrome (321520025123).

The spelling of 211310012011 in words is "two hundred eleven billion, three hundred ten million, twelve thousand, eleven".