220211101212021 has 6 divisors (see below), whose sum is σ = 318082701750710. Its totient is φ = 146807400808008.

The previous prime is 220211101212019. The next prime is 220211101212049. The reversal of 220211101212021 is 120212101112022.

220211101212021 is a `hidden beast` number, since 220 + 211 + 1 + 0 + 1 + 212 + 0 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 161722470510225 + 58488630701796 = 12717015^2 + 7647786^2 .

It is not a de Polignac number, because 220211101212021 - 2¹ = 220211101212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220211101211985 and 220211101212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220211101212121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12233950067326 + ... + 12233950067343.

Almost surely, 2^{220211101212021} is an apocalyptic number.

It is an amenable number.

220211101212021 is a deficient number, since it is larger than the sum of its proper divisors (97871600538689).

220211101212021 is a wasteful number, since it uses less digits than its factorization.

220211101212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24467900134675 (or 24467900134672 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 220211101212021 its reverse (120212101112022), we get a palindrome (340423202324043).

Subtracting from 220211101212021 its reverse (120212101112022), we obtain a palindrome (99999000099999).

The spelling of 220211101212021 in words is "two hundred twenty trillion, two hundred eleven billion, one hundred one million, two hundred twelve thousand, twenty-one".