201321101000 has 32 divisors (see below), whose sum is σ = 471091378680. Its totient is φ = 80528440000.

The previous prime is 201321100991. The next prime is 201321101029. The reversal of 201321101000 is 101123102.

It can be written as a sum of positive squares in 4 ways, for example, as 51689841316 + 149631259684 = 227354^2 + 386822^2 .

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, 100659551 + ... + 100661550.

Almost surely, 2^201321101000 is an apocalyptic number.

201321101000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201321101000 is an abundant number, since it is smaller than the sum of its proper divisors (269770277680).

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

201321101000 is a wasteful number, since it uses less digits than its factorization.

201321101000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201321122 (or 201321108 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 201321101000 its reverse (101123102), we get a palindrome (201422224102).

The spelling of 201321101000 in words is "two hundred one billion, three hundred twenty-one million, one hundred one thousand".