201001101020 has 24 divisors (see below), whose sum is σ = 427884538704. Its totient is φ = 79299063936.

The previous prime is 201001101019. The next prime is 201001101053. The reversal of 201001101020 is 20101100102.

It is a super-2 number, since 2×201001101020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201001100989 and 201001101007.

It is a congruent number.

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, 68834534 + ... + 68837453.

It is an arithmetic number, because the mean of its divisors is an integer number (17828522446).

Almost surely, 2^201001101020 is an apocalyptic number.

201001101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201001101020 is an abundant number, since it is smaller than the sum of its proper divisors (226883437684).

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

201001101020 is a wasteful number, since it uses less digits than its factorization.

201001101020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137672069 (or 137672067 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 201001101020 its reverse (20101100102), we get a palindrome (221102201122).

The spelling of 201001101020 in words is "two hundred one billion, one million, one hundred one thousand, twenty".