211331020301231 has 4 divisors (see below), whose sum is σ = 211331049714792. Its totient is φ = 211330990887672.

The previous prime is 211331020301221. The next prime is 211331020301237. The reversal of 211331020301231 is 132103020133112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211331020301231 - 2¹⁰ = 211331020300207 is a prime.

It is a super-2 number, since 2×211331020301231² (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 = 211331020301197 and 211331020301206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211331020301237) 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, 4013285 + ... + 20946801.

It is an arithmetic number, because the mean of its divisors is an integer number (52832762428698).

Almost surely, 2^{211331020301231} is an apocalyptic number.

211331020301231 is a deficient number, since it is larger than the sum of its proper divisors (29413561).

211331020301231 is a wasteful number, since it uses less digits than its factorization.

211331020301231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29413560.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 211331020301231 its reverse (132103020133112), we get a palindrome (343434040434343).

The spelling of 211331020301231 in words is "two hundred eleven trillion, three hundred thirty-one billion, twenty million, three hundred one thousand, two hundred thirty-one".