231211211021303 has 2 divisors, whose sum is σ = 231211211021304. Its totient is φ = 231211211021302.

The previous prime is 231211211021299. The next prime is 231211211021317. The reversal of 231211211021303 is 303120112112132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231211211021303 - 2² = 231211211021299 is a prime.

It is a super-3 number, since 3×231211211021303³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231211211021003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115605605510651 + 115605605510652.

It is an arithmetic number, because the mean of its divisors is an integer number (115605605510652).

Almost surely, 2^{231211211021303} is an apocalyptic number.

231211211021303 is a deficient number, since it is larger than the sum of its proper divisors (1).

231211211021303 is an equidigital number, since it uses as much as digits as its factorization.

231211211021303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 231211211021303 its reverse (303120112112132), we get a palindrome (534331323133435).

The spelling of 231211211021303 in words is "two hundred thirty-one trillion, two hundred eleven billion, two hundred eleven million, twenty-one thousand, three hundred three".