31120130220133 has 4 divisors (see below), whose sum is σ = 31129361944128. Its totient is φ = 31110898496140.

The previous prime is 31120130220073. The next prime is 31120130220143. The reversal of 31120130220133 is 33102203102113.

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-31120130220133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31120130220143) 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, 4615856941 + ... + 4615863682.

It is an arithmetic number, because the mean of its divisors is an integer number (7782340486032).

Almost surely, 2^{31120130220133} is an apocalyptic number.

It is an amenable number.

31120130220133 is a deficient number, since it is larger than the sum of its proper divisors (9231723995).

31120130220133 is an equidigital number, since it uses as much as digits as its factorization.

31120130220133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231723994.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31120130220133 its reverse (33102203102113), we get a palindrome (64222333322246).

The spelling of 31120130220133 in words is "thirty-one trillion, one hundred twenty billion, one hundred thirty million, two hundred twenty thousand, one hundred thirty-three".