201020120021000 has 96 divisors (see below), whose sum is σ = 547184971733400. Its totient is φ = 68921183990400.

The previous prime is 201020120020981. The next prime is 201020120021011. The reversal of 201020120021000 is 120021020102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46532671248196 + 154487448772804 = 6821486^2 + 12429298^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2051176715 + ... + 2051274714.

Almost surely, 2^{201020120021000} is an apocalyptic number.

201020120021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201020120021000 is an abundant number, since it is smaller than the sum of its proper divisors (346164851712400).

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

201020120021000 is a wasteful number, since it uses less digits than its factorization.

201020120021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4102451464 (or 4102451443 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 201020120021000 its reverse (120021020102), we get a palindrome (201140141041102).

The spelling of 201020120021000 in words is "two hundred one trillion, twenty billion, one hundred twenty million, twenty-one thousand".