220100212021 has 4 divisors (see below), whose sum is σ = 221252569344. Its totient is φ = 218947854700.

The previous prime is 220100211967. The next prime is 220100212039. The reversal of 220100212021 is 120212001022.

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 220100212021 - 2²¹ = 220098114869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220100211992 and 220100212010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220100212621) 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, 576178375 + ... + 576178756.

It is an arithmetic number, because the mean of its divisors is an integer number (55313142336).

Almost surely, 2^220100212021 is an apocalyptic number.

It is an amenable number.

220100212021 is a deficient number, since it is larger than the sum of its proper divisors (1152357323).

220100212021 is a wasteful number, since it uses less digits than its factorization.

220100212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152357322.

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

Adding to 220100212021 its reverse (120212001022), we get a palindrome (340312213043).

The spelling of 220100212021 in words is "two hundred twenty billion, one hundred million, two hundred twelve thousand, twenty-one".