212201210100021 has 8 divisors (see below), whose sum is σ = 282940009467840. Its totient is φ = 141464942066112.

The previous prime is 212201210099987. The next prime is 212201210100029. The reversal of 212201210100021 is 120001012102212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212201210100021 - 2¹¹ = 212201210097973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201210100029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632637865 + ... + 632973198.

It is an arithmetic number, because the mean of its divisors is an integer number (35367501183480).

Almost surely, 2^{212201210100021} is an apocalyptic number.

It is an amenable number.

212201210100021 is a deficient number, since it is larger than the sum of its proper divisors (70738799367819).

212201210100021 is a wasteful number, since it uses less digits than its factorization.

212201210100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265666955.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212201210100021 its reverse (120001012102212), we get a palindrome (332202222202233).

The spelling of 212201210100021 in words is "two hundred twelve trillion, two hundred one billion, two hundred ten million, one hundred thousand, twenty-one".