31020120203 has 8 divisors (see below), whose sum is σ = 31344963120. Its totient is φ = 30695624800.

The previous prime is 31020120113. The next prime is 31020120227. The reversal of 31020120203 is 30202102013.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31020120203 is a prime.

It is a super-2 number, since 2×31020120203² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31020120403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94553 + ... + 266421.

It is an arithmetic number, because the mean of its divisors is an integer number (3918120390).

Almost surely, 2^31020120203 is an apocalyptic number.

31020120203 is a deficient number, since it is larger than the sum of its proper divisors (324842917).

31020120203 is a wasteful number, since it uses less digits than its factorization.

31020120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173757.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31020120203 its reverse (30202102013), we get a palindrome (61222222216).

The spelling of 31020120203 in words is "thirty-one billion, twenty million, one hundred twenty thousand, two hundred three".