222101101212021 has 6 divisors (see below), whose sum is σ = 320812701750710. Its totient is φ = 148067400808008.

The previous prime is 222101101211981. The next prime is 222101101212043. The reversal of 222101101212021 is 120212101101222.

222101101212021 is a `hidden beast` number, since 22 + 210 + 110 + 121 + 202 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 217998167387121 + 4102933824900 = 14764761^2 + 2025570^2 .

It is not a de Polignac number, because 222101101212021 - 2¹¹ = 222101101209973 is a prime.

It is a super-2 number, since 2×222101101212021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222101101211985 and 222101101212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101101212121) 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, 12338950067326 + ... + 12338950067343.

Almost surely, 2^{222101101212021} is an apocalyptic number.

It is an amenable number.

222101101212021 is a deficient number, since it is larger than the sum of its proper divisors (98711600538689).

222101101212021 is a wasteful number, since it uses less digits than its factorization.

222101101212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24677900134675 (or 24677900134672 counting only the distinct ones).

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

Adding to 222101101212021 its reverse (120212101101222), we get a palindrome (342313202313243).

The spelling of 222101101212021 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred one million, two hundred twelve thousand, twenty-one".