421101202022201 has 4 divisors (see below), whose sum is σ = 421141394950692. Its totient is φ = 421061009093712.

The previous prime is 421101202022167. The next prime is 421101202022213. The reversal of 421101202022201 is 102220202101124.

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 387807159552400 + 33294042469801 = 19692820^2 + 5770099^2 .

It is a cyclic number.

It is not a de Polignac number, because 421101202022201 - 2¹⁰ = 421101202021177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421101232022201) 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, 20096448530 + ... + 20096469483.

It is an arithmetic number, because the mean of its divisors is an integer number (105285348737673).

Almost surely, 2^{421101202022201} is an apocalyptic number.

It is an amenable number.

421101202022201 is a deficient number, since it is larger than the sum of its proper divisors (40192928491).

421101202022201 is a wasteful number, since it uses less digits than its factorization.

421101202022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40192928490.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 421101202022201 its reverse (102220202101124), we get a palindrome (523321404123325).

The spelling of 421101202022201 in words is "four hundred twenty-one trillion, one hundred one billion, two hundred two million, twenty-two thousand, two hundred one".