201000012002221 has 4 divisors (see below), whose sum is σ = 201194590911292. Its totient is φ = 200805433093152.

The previous prime is 201000012002129. The next prime is 201000012002233. The reversal of 201000012002221 is 122200210000102.

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 123579106824996 + 77420905177225 = 11116614^2 + 8798915^2 .

It is a cyclic number.

It is not a de Polignac number, because 201000012002221 - 2⁹ = 201000012001709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201000012012221) 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, 97289452986 + ... + 97289455051.

It is an arithmetic number, because the mean of its divisors is an integer number (50298647727823).

Almost surely, 2^{201000012002221} is an apocalyptic number.

It is an amenable number.

201000012002221 is a deficient number, since it is larger than the sum of its proper divisors (194578909071).

201000012002221 is a wasteful number, since it uses less digits than its factorization.

201000012002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194578909070.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201000012002221 its reverse (122200210000102), we get a palindrome (323200222002323).

The spelling of 201000012002221 in words is "two hundred one trillion, twelve million, two thousand, two hundred twenty-one".