220001122021021 has 16 divisors (see below), whose sum is σ = 263616905111040. Its totient is φ = 181236622255920.

The previous prime is 220001122021007. The next prime is 220001122021027. The reversal of 220001122021021 is 120120221100022.

It is a happy number.

It is not a de Polignac number, because 220001122021021 - 2⁴³ = 211205028998813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220001122020986 and 220001122021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220001122021027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22883407095 + ... + 22883416708.

It is an arithmetic number, because the mean of its divisors is an integer number (16476056569440).

Almost surely, 2^{220001122021021} is an apocalyptic number.

It is an amenable number.

220001122021021 is a deficient number, since it is larger than the sum of its proper divisors (43615783090019).

220001122021021 is a wasteful number, since it uses less digits than its factorization.

220001122021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45766823856.

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

Adding to 220001122021021 its reverse (120120221100022), we get a palindrome (340121343121043).

The spelling of 220001122021021 in words is "two hundred twenty trillion, one billion, one hundred twenty-two million, twenty-one thousand, twenty-one".