33031442121 has 32 divisors (see below), whose sum is σ = 46506700800. Its totient is φ = 20824440000.

The previous prime is 33031442083. The next prime is 33031442173. The reversal of 33031442121 is 12124413033.

It is a happy number.

It is not a de Polignac number, because 33031442121 - 2¹⁰ = 33031441097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33031442091 and 33031442100.

It is not an unprimeable number, because it can be changed into a prime (33031442321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1223830 + ... + 1250528.

It is an arithmetic number, because the mean of its divisors is an integer number (1453334400).

Almost surely, 2^33031442121 is an apocalyptic number.

33031442121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

33031442121 is a deficient number, since it is larger than the sum of its proper divisors (13475258679).

33031442121 is a wasteful number, since it uses less digits than its factorization.

33031442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27037.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 33031442121 its reverse (12124413033), we get a palindrome (45155855154).

The spelling of 33031442121 in words is "thirty-three billion, thirty-one million, four hundred forty-two thousand, one hundred twenty-one".