201121320020 has 48 divisors (see below), whose sum is σ = 430400452608. Its totient is φ = 78922911360.

The previous prime is 201121320019. The next prime is 201121320053. The reversal of 201121320020 is 20023121102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201121319977 and 201121320004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252047 + ... + 682473.

It is an arithmetic number, because the mean of its divisors is an integer number (8966676096).

Almost surely, 2^201121320020 is an apocalyptic number.

201121320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121320020 is an abundant number, since it is smaller than the sum of its proper divisors (229279132588).

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

201121320020 is a wasteful number, since it uses less digits than its factorization.

201121320020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430880 (or 430878 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201121320020 its reverse (20023121102), we get a palindrome (221144441122).

The spelling of 201121320020 in words is "two hundred one billion, one hundred twenty-one million, three hundred twenty thousand, twenty".