221020120100201 has 4 divisors (see below), whose sum is σ = 224133079538304. Its totient is φ = 217907160662100.

The previous prime is 221020120100189. The next prime is 221020120100203. The reversal of 221020120100201 is 102001021020122.

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 221020120100201 - 2⁶ = 221020120100137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221020120100203) 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, 1556479718945 + ... + 1556479719086.

It is an arithmetic number, because the mean of its divisors is an integer number (56033269884576).

Almost surely, 2^{221020120100201} is an apocalyptic number.

It is an amenable number.

221020120100201 is a deficient number, since it is larger than the sum of its proper divisors (3112959438103).

221020120100201 is an equidigital number, since it uses as much as digits as its factorization.

221020120100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112959438102.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020120100201 its reverse (102001021020122), we get a palindrome (323021141120323).

The spelling of 221020120100201 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty million, one hundred thousand, two hundred one".