211012201221 has 8 divisors (see below), whose sum is σ = 281432584704. Its totient is φ = 140633309280.

The previous prime is 211012201219. The next prime is 211012201243. The reversal of 211012201221 is 122102210112.

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

It is not a de Polignac number, because 211012201221 - 2¹ = 211012201219 is a prime.

It is a super-2 number, since 2×211012201221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211012201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211012201271) 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, 10361016 + ... + 10381361.

It is an arithmetic number, because the mean of its divisors is an integer number (35179073088).

Almost surely, 2^211012201221 is an apocalyptic number.

It is an amenable number.

211012201221 is a deficient number, since it is larger than the sum of its proper divisors (70420383483).

211012201221 is a wasteful number, since it uses less digits than its factorization.

211012201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20745771.

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

Adding to 211012201221 its reverse (122102210112), we get a palindrome (333114411333).

The spelling of 211012201221 in words is "two hundred eleven billion, twelve million, two hundred one thousand, two hundred twenty-one".