1020012031 has 4 divisors (see below), whose sum is σ = 1020405600. Its totient is φ = 1019618464.

The previous prime is 1020012013. The next prime is 1020012107. The reversal of 1020012031 is 1302100201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1302100201 = 211 ⋅6171091.

It is a cyclic number.

It is not a de Polignac number, because 1020012031 - 2⁵ = 1020011999 is a prime.

It is a super-2 number, since 2×1020012031² = 2080849086769489922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020011999 and 1020012017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020010031) 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 3 ways as a sum of consecutive naturals, for example, 192871 + ... + 198088.

It is an arithmetic number, because the mean of its divisors is an integer number (255101400).

Almost surely, 2^1020012031 is an apocalyptic number.

1020012031 is a deficient number, since it is larger than the sum of its proper divisors (393569).

1020012031 is an equidigital number, since it uses as much as digits as its factorization.

1020012031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393568.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1020012031 is about 31937.6271973984. The cubic root of 1020012031 is about 1006.6266672824.

Adding to 1020012031 its reverse (1302100201), we get a palindrome (2322112232).

The spelling of 1020012031 in words is "one billion, twenty million, twelve thousand, thirty-one".