211231310122 has 16 divisors (see below), whose sum is σ = 362139109632. Its totient is φ = 90520631280.

The previous prime is 211231310117. The next prime is 211231310137. The reversal of 211231310122 is 221013132112.

It is a self number, because there is not a number n which added to its sum of digits gives 211231310122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401778 + ... + 764125.

It is an arithmetic number, because the mean of its divisors is an integer number (22633694352).

Almost surely, 2^211231310122 is an apocalyptic number.

211231310122 is a deficient number, since it is larger than the sum of its proper divisors (150907799510).

211231310122 is a wasteful number, since it uses less digits than its factorization.

211231310122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178853.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211231310122 its reverse (221013132112), we get a palindrome (432244442234).

The spelling of 211231310122 in words is "two hundred eleven billion, two hundred thirty-one million, three hundred ten thousand, one hundred twenty-two".