201121011020 has 12 divisors (see below), whose sum is σ = 422354123184. Its totient is φ = 80448404400.

The previous prime is 201121010989. The next prime is 201121011023. The reversal of 201121011020 is 20110121102.

201121011020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×201121011020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201121010992 and 201121011010.

It is not an unprimeable number, because it can be changed into a prime (201121011023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5028025256 + ... + 5028025295.

It is an arithmetic number, because the mean of its divisors is an integer number (35196176932).

Almost surely, 2^201121011020 is an apocalyptic number.

201121011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121011020 is an abundant number, since it is smaller than the sum of its proper divisors (221233112164).

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

201121011020 is a wasteful number, since it uses less digits than its factorization.

201121011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10056050560 (or 10056050558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 201121011020 its reverse (20110121102), we get a palindrome (221231132122).

The spelling of 201121011020 in words is "two hundred one billion, one hundred twenty-one million, eleven thousand, twenty".