20001102012 has 48 divisors (see below), whose sum is σ = 51879116800. Its totient is φ = 6663895920.

The previous prime is 20001101993. The next prime is 20001102031. The reversal of 20001102012 is 21020110002.

It is an interprime number because it is at equal distance from previous prime (20001101993) and next prime (20001102031).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20001101985 and 20001102003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192837 + ... + 277827.

Almost surely, 2^20001102012 is an apocalyptic number.

It is an amenable number.

20001102012 is an abundant number, since it is smaller than the sum of its proper divisors (31878014788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001102012 is a wasteful number, since it uses less digits than its factorization.

20001102012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87183 (or 87175 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20001102012 its reverse (21020110002), we get a palindrome (41021212014).

The spelling of 20001102012 in words is "twenty billion, one million, one hundred two thousand, twelve".