1031121221033 has 16 divisors (see below), whose sum is σ = 1071562484880. Its totient is φ = 991355904000.

The previous prime is 1031121221027. The next prime is 1031121221099. The reversal of 1031121221033 is 3301221211301.

It is a happy number.

1031121221033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 356567819689 + 674553401344 = 597133^2 + 821312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031121221033 - 2⁸ = 1031121220777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031121220996 and 1031121221014.

It is not an unprimeable number, because it can be changed into a prime (1031121221233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5174303 + ... + 5369883.

It is an arithmetic number, because the mean of its divisors is an integer number (66972655305).

Almost surely, 2^{1031121221033} is an apocalyptic number.

It is an amenable number.

1031121221033 is a deficient number, since it is larger than the sum of its proper divisors (40441263847).

1031121221033 is a wasteful number, since it uses less digits than its factorization.

1031121221033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197308.

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

Adding to 1031121221033 its reverse (3301221211301), we get a palindrome (4332342432334).

The spelling of 1031121221033 in words is "one trillion, thirty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, thirty-three".