20101012 has 12 divisors (see below), whose sum is σ = 37028320. Its totient is φ = 9521496.

The previous prime is 20101009. The next prime is 20101013. The reversal of 20101012 is 21010102.

It is a junction number, because it is equal to n+sod(n) for n = 20100986 and 20101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101013) 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 3 ways as a sum of consecutive naturals, for example, 132168 + ... + 132319.

Almost surely, 2^20101012 is an apocalyptic number.

It is an amenable number.

20101012 is a deficient number, since it is larger than the sum of its proper divisors (16927308).

20101012 is a wasteful number, since it uses less digits than its factorization.

20101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264510 (or 264508 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 20101012 is about 4483.4152161048. The cubic root of 20101012 is about 271.8979757216.

Adding to 20101012 its reverse (21010102), we get a palindrome (41111114).

The spelling of 20101012 in words is "twenty million, one hundred one thousand, twelve".