212120202021101 has 32 divisors (see below), whose sum is σ = 244055056859136. Its totient is φ = 182567407464000.

The previous prime is 212120202021073. The next prime is 212120202021107. The reversal of 212120202021101 is 101120202021212.

It is a cyclic number.

It is not a de Polignac number, because 212120202021101 - 2¹⁸ = 212120201758957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212120202021101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120202021107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34692386 + ... + 40346028.

It is an arithmetic number, because the mean of its divisors is an integer number (7626720526848).

Almost surely, 2^{212120202021101} is an apocalyptic number.

It is an amenable number.

212120202021101 is a deficient number, since it is larger than the sum of its proper divisors (31934854838035).

212120202021101 is a wasteful number, since it uses less digits than its factorization.

212120202021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656073.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212120202021101 its reverse (101120202021212), we get a palindrome (313240404042313).

The spelling of 212120202021101 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred two million, twenty-one thousand, one hundred one".