201001202020 has 24 divisors (see below), whose sum is σ = 422261380800. Its totient is φ = 80370222432.

The previous prime is 201001201991. The next prime is 201001202041. The reversal of 201001202020 is 20202100102.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 201001201988 and 201001202006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1836640 + ... + 1942999.

It is an arithmetic number, because the mean of its divisors is an integer number (17594224200).

Almost surely, 2^201001202020 is an apocalyptic number.

201001202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001202020 is an abundant number, since it is smaller than the sum of its proper divisors (221260178780).

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

201001202020 is a wasteful number, since it uses less digits than its factorization.

201001202020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782307 (or 3782305 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201001202020 its reverse (20202100102), we get a palindrome (221203302122).

The spelling of 201001202020 in words is "two hundred one billion, one million, two hundred two thousand, twenty".