201321020 has 12 divisors (see below), whose sum is σ = 422774184. Its totient is φ = 80528400.

The previous prime is 201321013. The next prime is 201321023. The reversal of 201321020 is 20123102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201320992 and 201321010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201321023) 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, 5033006 + ... + 5033045.

It is an arithmetic number, because the mean of its divisors is an integer number (35231182).

Almost surely, 2^201321020 is an apocalyptic number.

201321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201321020 is an abundant number, since it is smaller than the sum of its proper divisors (221453164).

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

201321020 is a wasteful number, since it uses less digits than its factorization.

201321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10066060 (or 10066058 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 201321020 is about 14188.7638644105. The cubic root of 201321020 is about 586.0882851450.

Adding to 201321020 its reverse (20123102), we get a palindrome (221444122).

The spelling of 201321020 in words is "two hundred one million, three hundred twenty-one thousand, twenty".