221001100032101 has 4 divisors (see below), whose sum is σ = 228130167775104. Its totient is φ = 213872032289100.

The previous prime is 221001100031939. The next prime is 221001100032121. The reversal of 221001100032101 is 101230001100122.

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 221001100032101 - 2³⁴ = 220983920162917 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 (221001100032121) 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, 3564533871455 + ... + 3564533871516.

It is an arithmetic number, because the mean of its divisors is an integer number (57032541943776).

Almost surely, 2^{221001100032101} is an apocalyptic number.

It is an amenable number.

221001100032101 is a deficient number, since it is larger than the sum of its proper divisors (7129067743003).

221001100032101 is an equidigital number, since it uses as much as digits as its factorization.

221001100032101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129067743002.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 221001100032101 its reverse (101230001100122), we get a palindrome (322231101132223).

The spelling of 221001100032101 in words is "two hundred twenty-one trillion, one billion, one hundred million, thirty-two thousand, one hundred one".