220220011210021 has 4 divisors (see below), whose sum is σ = 220220273617344. Its totient is φ = 220219748802700.

The previous prime is 220220011210019. The next prime is 220220011210057. The reversal of 220220011210021 is 120012110022022.

It is a happy number.

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 220220011210021 - 2¹ = 220220011210019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220011209977 and 220220011210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220011210621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129940765 + ... + 131624626.

It is an arithmetic number, because the mean of its divisors is an integer number (55055068404336).

Almost surely, 2^{220220011210021} is an apocalyptic number.

It is an amenable number.

220220011210021 is a deficient number, since it is larger than the sum of its proper divisors (262407323).

220220011210021 is an equidigital number, since it uses as much as digits as its factorization.

220220011210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262407322.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 220220011210021 its reverse (120012110022022), we get a palindrome (340232121232043).

The spelling of 220220011210021 in words is "two hundred twenty trillion, two hundred twenty billion, eleven million, two hundred ten thousand, twenty-one".