211311012031 has 16 divisors (see below), whose sum is σ = 246109653504. Its totient is φ = 177666731424.

The previous prime is 211311012001. The next prime is 211311012071. The reversal of 211311012031 is 130210113112.

It is a happy number.

It is not a de Polignac number, because 211311012031 - 2⁵ = 211311011999 is a prime.

It is a super-2 number, since 2×211311012031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211311011996 and 211311012014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211311012001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1668900 + ... + 1791046.

It is an arithmetic number, because the mean of its divisors is an integer number (15381853344).

Almost surely, 2^211311012031 is an apocalyptic number.

211311012031 is a deficient number, since it is larger than the sum of its proper divisors (34798641473).

211311012031 is a wasteful number, since it uses less digits than its factorization.

211311012031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126870.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211311012031 its reverse (130210113112), we get a palindrome (341521125143).

The spelling of 211311012031 in words is "two hundred eleven billion, three hundred eleven million, twelve thousand, thirty-one".