220212010021 has 4 divisors (see below), whose sum is σ = 223228612972. Its totient is φ = 217195407072.

The previous prime is 220212009989. The next prime is 220212010027. The reversal of 220212010021 is 120010212022.

It is a happy number.

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 182362307521 + 37849702500 = 427039^2 + 194550^2 .

It is a cyclic number.

It is not a de Polignac number, because 220212010021 - 2⁵ = 220212009989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220212009983 and 220212010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212010027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508301366 + ... + 1508301511.

It is an arithmetic number, because the mean of its divisors is an integer number (55807153243).

Almost surely, 2^220212010021 is an apocalyptic number.

It is an amenable number.

220212010021 is a deficient number, since it is larger than the sum of its proper divisors (3016602951).

220212010021 is an equidigital number, since it uses as much as digits as its factorization.

220212010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016602950.

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

Adding to 220212010021 its reverse (120010212022), we get a palindrome (340222222043).

The spelling of 220212010021 in words is "two hundred twenty billion, two hundred twelve million, ten thousand, twenty-one".