221001210100201 has 4 divisors (see below), whose sum is σ = 222741377108992. Its totient is φ = 219261043091412.

The previous prime is 221001210100147. The next prime is 221001210100217. The reversal of 221001210100201 is 102001012100122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221001210100201 - 2⁹ = 221001210099689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221001210100291) 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, 870083504205 + ... + 870083504458.

It is an arithmetic number, because the mean of its divisors is an integer number (55685344277248).

Almost surely, 2^{221001210100201} is an apocalyptic number.

It is an amenable number.

221001210100201 is a deficient number, since it is larger than the sum of its proper divisors (1740167008791).

221001210100201 is a wasteful number, since it uses less digits than its factorization.

221001210100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740167008790.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221001210100201 its reverse (102001012100122), we get a palindrome (323002222200323).

The spelling of 221001210100201 in words is "two hundred twenty-one trillion, one billion, two hundred ten million, one hundred thousand, two hundred one".