201000202001021 has 4 divisors (see below), whose sum is σ = 201000246180444. Its totient is φ = 201000157821600.

The previous prime is 201000202000981. The next prime is 201000202001059. The reversal of 201000202001021 is 120100202000102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103077520344100 + 97922681656921 = 10152710^2 + 9895589^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000202001021 - 2⁶ = 201000202000957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201000202000993 and 201000202001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000202001321) 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, 14364770 + ... + 24664691.

It is an arithmetic number, because the mean of its divisors is an integer number (50250061545111).

Almost surely, 2^{201000202001021} is an apocalyptic number.

It is an amenable number.

201000202001021 is a deficient number, since it is larger than the sum of its proper divisors (44179423).

201000202001021 is an equidigital number, since it uses as much as digits as its factorization.

201000202001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44179422.

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

Adding to 201000202001021 its reverse (120100202000102), we get a palindrome (321100404001123).

The spelling of 201000202001021 in words is "two hundred one trillion, two hundred two million, one thousand, twenty-one".