201143403551021 has 8 divisors (see below), whose sum is σ = 201155287443480. Its totient is φ = 201131520073792.

The previous prime is 201143403551011. The next prime is 201143403551023. The reversal of 201143403551021 is 120155304341102.

201143403551021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4779094420996 + 196364309130025 = 2186114^2 + 14013005^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201143403551021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201143403551023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1597162571 + ... + 1597288503.

It is an arithmetic number, because the mean of its divisors is an integer number (25144410930435).

Almost surely, 2^{201143403551021} is an apocalyptic number.

It is an amenable number.

201143403551021 is a deficient number, since it is larger than the sum of its proper divisors (11883892459).

201143403551021 is a wasteful number, since it uses less digits than its factorization.

201143403551021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207615.

The product of its (nonzero) digits is 14400, while the sum is 32.

Adding to 201143403551021 its reverse (120155304341102), we get a palindrome (321298707892123).

The spelling of 201143403551021 in words is "two hundred one trillion, one hundred forty-three billion, four hundred three million, five hundred fifty-one thousand, twenty-one".