1031211002221 has 4 divisors (see below), whose sum is σ = 1031219609472. Its totient is φ = 1031202394972.

The previous prime is 1031211002201. The next prime is 1031211002251. The reversal of 1031211002221 is 1222001121301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031211002221 is a prime.

It is a super-3 number, since 3×1031211002221³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031211002195 and 1031211002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031211002201) 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, 4121341 + ... + 4364386.

It is an arithmetic number, because the mean of its divisors is an integer number (257804902368).

Almost surely, 2^{1031211002221} is an apocalyptic number.

It is an amenable number.

1031211002221 is a deficient number, since it is larger than the sum of its proper divisors (8607251).

1031211002221 is an equidigital number, since it uses as much as digits as its factorization.

1031211002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8607250.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1031211002221 its reverse (1222001121301), we get a palindrome (2253212123522).

The spelling of 1031211002221 in words is "one trillion, thirty-one billion, two hundred eleven million, two thousand, two hundred twenty-one".