20001001012 has 12 divisors (see below), whose sum is σ = 35444812480. Its totient is φ = 9873911736.

The previous prime is 20001000977. The next prime is 20001001021. The reversal of 20001001012 is 21010010002.

It is a junction number, because it is equal to n+sod(n) for n = 20001000986 and 20001001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31646838 + ... + 31647469.

Almost surely, 2^20001001012 is an apocalyptic number.

It is an amenable number.

20001001012 is a deficient number, since it is larger than the sum of its proper divisors (15443811468).

20001001012 is a wasteful number, since it uses less digits than its factorization.

20001001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63294390 (or 63294388 counting only the distinct ones).

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

Adding to 20001001012 its reverse (21010010002), we get a palindrome (41011011014).

The spelling of 20001001012 in words is "twenty billion, one million, one thousand, twelve".