1031211321340 has 24 divisors (see below), whose sum is σ = 2189875731120. Its totient is φ = 407849870208.

The previous prime is 1031211321229. The next prime is 1031211321341. The reversal of 1031211321340 is 431231121301.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031211321341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289664322 + ... + 289667881.

It is an arithmetic number, because the mean of its divisors is an integer number (91244822130).

Almost surely, 2^{1031211321340} is an apocalyptic number.

1031211321340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031211321340 is an abundant number, since it is smaller than the sum of its proper divisors (1158664409780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1031211321340 is a wasteful number, since it uses less digits than its factorization.

1031211321340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579332301 (or 579332299 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1031211321340 its reverse (431231121301), we get a palindrome (1462442442641).

The spelling of 1031211321340 in words is "one trillion, thirty-one billion, two hundred eleven million, three hundred twenty-one thousand, three hundred forty".