212211221101021 has 8 divisors (see below), whose sum is σ = 213423270619104. Its totient is φ = 210999606878160.

The previous prime is 212211221101007. The next prime is 212211221101097. The reversal of 212211221101021 is 120101122112212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212211221101021 - 2⁹ = 212211221100509 is a prime.

It is a super-2 number, since 2×212211221101021² (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 212211221101021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212211221101421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107845975 + ... + 109796068.

It is an arithmetic number, because the mean of its divisors is an integer number (26677908827388).

Almost surely, 2^{212211221101021} is an apocalyptic number.

It is an amenable number.

212211221101021 is a deficient number, since it is larger than the sum of its proper divisors (1212049518083).

212211221101021 is a wasteful number, since it uses less digits than its factorization.

212211221101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217647611.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212211221101021 its reverse (120101122112212), we get a palindrome (332312343213233).

The spelling of 212211221101021 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred twenty-one million, one hundred one thousand, twenty-one".