220011211102021 has 4 divisors (see below), whose sum is σ = 223025063308972. Its totient is φ = 216997358895072.

The previous prime is 220011211102019. The next prime is 220011211102141. The reversal of 220011211102021 is 120201112110022.

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 186656774493121 + 33354436608900 = 13662239^2 + 5775330^2 .

It is a cyclic number.

It is not a de Polignac number, because 220011211102021 - 2¹ = 220011211102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220011211101986 and 220011211102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220011211102421) 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, 1506926103366 + ... + 1506926103511.

It is an arithmetic number, because the mean of its divisors is an integer number (55756265827243).

Almost surely, 2^{220011211102021} is an apocalyptic number.

It is an amenable number.

220011211102021 is a deficient number, since it is larger than the sum of its proper divisors (3013852206951).

220011211102021 is an equidigital number, since it uses as much as digits as its factorization.

220011211102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013852206950.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 220011211102021 its reverse (120201112110022), we get a palindrome (340212323212043).

The spelling of 220011211102021 in words is "two hundred twenty trillion, eleven billion, two hundred eleven million, one hundred two thousand, twenty-one".