212211021221121 has 8 divisors (see below), whose sum is σ = 304713261240640. Its totient is φ = 130591397674512.

The previous prime is 212211021221077. The next prime is 212211021221123. The reversal of 212211021221121 is 121122120112212.

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

It is not a de Polignac number, because 212211021221121 - 2⁷ = 212211021220993 is a prime.

It is a super-2 number, since 2×212211021221121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212211021221123) 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, 2720654118181 + ... + 2720654118258.

It is an arithmetic number, because the mean of its divisors is an integer number (38089157655080).

Almost surely, 2^{212211021221121} is an apocalyptic number.

It is an amenable number.

212211021221121 is a deficient number, since it is larger than the sum of its proper divisors (92502240019519).

212211021221121 is a wasteful number, since it uses less digits than its factorization.

212211021221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441308236455.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 212211021221121 its reverse (121122120112212), we get a palindrome (333333141333333).

The spelling of 212211021221121 in words is "two hundred twelve trillion, two hundred eleven billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".