212101221001 has 16 divisors (see below), whose sum is σ = 220314470400. Its totient is φ = 203975976960.

The previous prime is 212101220999. The next prime is 212101221049. The reversal of 212101221001 is 100122101212.

It is a cyclic number.

It is not a de Polignac number, because 212101221001 - 2¹ = 212101220999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212101221601) 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, 5683200 + ... + 5720398.

It is an arithmetic number, because the mean of its divisors is an integer number (13769654400).

Almost surely, 2^212101221001 is an apocalyptic number.

It is an amenable number.

212101221001 is a deficient number, since it is larger than the sum of its proper divisors (8213249399).

212101221001 is a wasteful number, since it uses less digits than its factorization.

212101221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38376.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212101221001 its reverse (100122101212), we get a palindrome (312223322213).

The spelling of 212101221001 in words is "two hundred twelve billion, one hundred one million, two hundred twenty-one thousand, one".