31120001 has 16 divisors (see below), whose sum is σ = 35278848. Its totient is φ = 27195600.

The previous prime is 31119983. The next prime is 31120009. The reversal of 31120001 is 10002113.

31120001 = T₂₃₈ + T₂₃₉ + ... + T₅₈₄.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31120001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31120009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89510 + ... + 89856.

It is an arithmetic number, because the mean of its divisors is an integer number (2204928).

Almost surely, 2^31120001 is an apocalyptic number.

31120001 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31120001 is a deficient number, since it is larger than the sum of its proper divisors (4158847).

31120001 is a wasteful number, since it uses less digits than its factorization.

31120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 31120001 is about 5578.5303620219. The cubic root of 31120001 is about 314.5428861505.

Adding to 31120001 its reverse (10002113), we get a palindrome (41122114).

The spelling of 31120001 in words is "thirty-one million, one hundred twenty thousand, one".