220020210001021 has 4 divisors (see below), whose sum is σ = 220076180549344. Its totient is φ = 219964239452700.

The previous prime is 220020210000971. The next prime is 220020210001027. The reversal of 220020210001021 is 120100012020022.

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 220020210001021 - 2⁷ = 220020210000893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220020210000992 and 220020210001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220020210001027) 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, 27985268265 + ... + 27985276126.

It is an arithmetic number, because the mean of its divisors is an integer number (55019045137336).

Almost surely, 2^{220020210001021} is an apocalyptic number.

It is an amenable number.

220020210001021 is a deficient number, since it is larger than the sum of its proper divisors (55970548323).

220020210001021 is an equidigital number, since it uses as much as digits as its factorization.

220020210001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55970548322.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 220020210001021 its reverse (120100012020022), we get a palindrome (340120222021043).

The spelling of 220020210001021 in words is "two hundred twenty trillion, twenty billion, two hundred ten million, one thousand, twenty-one".