201121113020 has 96 divisors (see below), whose sum is σ = 434412320832. Its totient is φ = 78188986368.

The previous prime is 201121113007. The next prime is 201121113031. The reversal of 201121113020 is 20311121102.

It is a super-2 number, since 2×201121113020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201121112986 and 201121113004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52469024 + ... + 52472856.

It is an arithmetic number, because the mean of its divisors is an integer number (4525128342).

Almost surely, 2^201121113020 is an apocalyptic number.

201121113020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121113020 is an abundant number, since it is smaller than the sum of its proper divisors (233291207812).

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

201121113020 is a wasteful number, since it uses less digits than its factorization.

201121113020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431 (or 4429 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201121113020 its reverse (20311121102), we get a palindrome (221432234122).

The spelling of 201121113020 in words is "two hundred one billion, one hundred twenty-one million, one hundred thirteen thousand, twenty".