220201111021 has 4 divisors (see below), whose sum is σ = 231790643200. Its totient is φ = 208611578844.

The previous prime is 220201111003. The next prime is 220201111033. The reversal of 220201111021 is 120111102022.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120111102022 = 2 ⋅60055551011.

It is a cyclic number.

It is not a de Polignac number, because 220201111021 - 2¹¹ = 220201108973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220201110992 and 220201111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220201111001) 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, 5794766061 + ... + 5794766098.

It is an arithmetic number, because the mean of its divisors is an integer number (57947660800).

Almost surely, 2^220201111021 is an apocalyptic number.

It is an amenable number.

220201111021 is a deficient number, since it is larger than the sum of its proper divisors (11589532179).

220201111021 is a wasteful number, since it uses less digits than its factorization.

220201111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589532178.

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

Adding to 220201111021 its reverse (120111102022), we get a palindrome (340312213043).

The spelling of 220201111021 in words is "two hundred twenty billion, two hundred one million, one hundred eleven thousand, twenty-one".