20020101012 has 72 divisors (see below), whose sum is σ = 51780997632. Its totient is φ = 6519009600.

The previous prime is 20020101001. The next prime is 20020101029. The reversal of 20020101012 is 21010102002.

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 = 20020100985 and 20020101003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 904437 + ... + 926307.

Almost surely, 2^20020101012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020101012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25890498816).

20020101012 is an abundant number, since it is smaller than the sum of its proper divisors (31760896620).

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

20020101012 is a wasteful number, since it uses less digits than its factorization.

20020101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22469 (or 22464 counting only the distinct ones).

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

Adding to 20020101012 its reverse (21010102002), we get a palindrome (41030203014).

The spelling of 20020101012 in words is "twenty billion, twenty million, one hundred one thousand, twelve".