2021311231351 has 2 divisors, whose sum is σ = 2021311231352. Its totient is φ = 2021311231350.

The previous prime is 2021311231343. The next prime is 2021311231393. The reversal of 2021311231351 is 1531321131202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021311231351 - 2³ = 2021311231343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021311931351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010655615675 + 1010655615676.

It is an arithmetic number, because the mean of its divisors is an integer number (1010655615676).

Almost surely, 2^{2021311231351} is an apocalyptic number.

2021311231351 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021311231351 is an equidigital number, since it uses as much as digits as its factorization.

2021311231351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

Adding to 2021311231351 its reverse (1531321131202), we get a palindrome (3552632362553).

The spelling of 2021311231351 in words is "two trillion, twenty-one billion, three hundred eleven million, two hundred thirty-one thousand, three hundred fifty-one".