212021222101111 has 16 divisors (see below), whose sum is σ = 224732270841120. Its totient is φ = 199336865771520.

The previous prime is 212021222101069. The next prime is 212021222101121. The reversal of 212021222101111 is 111101222120212.

It is a happy number.

It is not a de Polignac number, because 212021222101111 - 2²¹ = 212021220003959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212021222101121) 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, 58186801 + ... + 61723141.

It is an arithmetic number, because the mean of its divisors is an integer number (14045766927570).

Almost surely, 2^{212021222101111} is an apocalyptic number.

212021222101111 is a deficient number, since it is larger than the sum of its proper divisors (12711048740009).

212021222101111 is a wasteful number, since it uses less digits than its factorization.

212021222101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3540114.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212021222101111 its reverse (111101222120212), we get a palindrome (323122444221323).

The spelling of 212021222101111 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred eleven".