211421310211031 has 4 divisors (see below), whose sum is σ = 217135399676232. Its totient is φ = 205707220745832.

The previous prime is 211421310211021. The next prime is 211421310211073. The reversal of 211421310211031 is 130112013124112.

211421310211031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-211421310211031 is a prime.

It is a super-2 number, since 2×211421310211031² (a number of 29 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 = 211421310210988 and 211421310211006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421310211021) 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, 2857044732545 + ... + 2857044732618.

It is an arithmetic number, because the mean of its divisors is an integer number (54283849919058).

Almost surely, 2^{211421310211031} is an apocalyptic number.

211421310211031 is a deficient number, since it is larger than the sum of its proper divisors (5714089465201).

211421310211031 is an equidigital number, since it uses as much as digits as its factorization.

211421310211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714089465200.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 211421310211031 its reverse (130112013124112), we get a palindrome (341533323335143).

The spelling of 211421310211031 in words is "two hundred eleven trillion, four hundred twenty-one billion, three hundred ten million, two hundred eleven thousand, thirty-one".