211012102101221 has 16 divisors (see below), whose sum is σ = 215584690261248. Its totient is φ = 206442980443200.

The previous prime is 211012102101211. The next prime is 211012102101263. The reversal of 211012102101221 is 122101201210112.

It is a cyclic number.

It is not a de Polignac number, because 211012102101221 - 2¹⁴ = 211012102084837 is a prime.

It is a super-2 number, since 2×211012102101221² (a number of 29 digits) contains 22 as substring.

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 211012102101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012102101211) 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, 2555481866 + ... + 2555564436.

It is an arithmetic number, because the mean of its divisors is an integer number (13474043141328).

Almost surely, 2^{211012102101221} is an apocalyptic number.

It is an amenable number.

211012102101221 is a deficient number, since it is larger than the sum of its proper divisors (4572588160027).

211012102101221 is a wasteful number, since it uses less digits than its factorization.

211012102101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102892.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 211012102101221 its reverse (122101201210112), we get a palindrome (333113303311333).

The spelling of 211012102101221 in words is "two hundred eleven trillion, twelve billion, one hundred two million, one hundred one thousand, two hundred twenty-one".