1021311421311 has 4 divisors (see below), whose sum is σ = 1361748561752. Its totient is φ = 680874280872.

The previous prime is 1021311421309. The next prime is 1021311421313. The reversal of 1021311421311 is 1131241131201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1021311421309) and next prime (1021311421313).

It is not a de Polignac number, because 1021311421311 - 2¹ = 1021311421309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021311421313) 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, 170218570216 + ... + 170218570221.

It is an arithmetic number, because the mean of its divisors is an integer number (340437140438).

Almost surely, 2^{1021311421311} is an apocalyptic number.

1021311421311 is a deficient number, since it is larger than the sum of its proper divisors (340437140441).

1021311421311 is an equidigital number, since it uses as much as digits as its factorization.

1021311421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340437140440.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 1021311421311 its reverse (1131241131201), we get a palindrome (2152552552512).

The spelling of 1021311421311 in words is "one trillion, twenty-one billion, three hundred eleven million, four hundred twenty-one thousand, three hundred eleven".