1031032311221 has 12 divisors (see below), whose sum is σ = 1144149450144. Its totient is φ = 921415590600.

The previous prime is 1031032311173. The next prime is 1031032311227. The reversal of 1031032311221 is 1221132301301.

It is a happy number.

It is not a de Polignac number, because 1031032311221 - 2¹⁸ = 1031032049077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031032311193 and 1031032311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031032311227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13424825 + ... + 13501406.

It is an arithmetic number, because the mean of its divisors is an integer number (95345787512).

Almost surely, 2^{1031032311221} is an apocalyptic number.

1031032311221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1031032311221 is a deficient number, since it is larger than the sum of its proper divisors (113117138923).

1031032311221 is an equidigital number, since it uses as much as digits as its factorization.

1031032311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26926360 (or 26926301 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1031032311221 its reverse (1221132301301), we get a palindrome (2252164612522).

The spelling of 1031032311221 in words is "one trillion, thirty-one billion, thirty-two million, three hundred eleven thousand, two hundred twenty-one".