212002121220121 has 8 divisors (see below), whose sum is σ = 213555040482024. Its totient is φ = 210449281067520.

The previous prime is 212002121220119. The next prime is 212002121220173. The reversal of 212002121220121 is 121022121200212.

It can be written as a sum of positive squares in 4 ways, for example, as 94259244038400 + 117742877181721 = 9708720^2 + 10850939^2 .

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 212002121220121 - 2¹ = 212002121220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212002121220821) 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, 14392620 + ... + 25122733.

It is an arithmetic number, because the mean of its divisors is an integer number (26694380060253).

Almost surely, 2^{212002121220121} is an apocalyptic number.

It is an amenable number.

212002121220121 is a deficient number, since it is larger than the sum of its proper divisors (1552919261903).

212002121220121 is a wasteful number, since it uses less digits than its factorization.

212002121220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39554651.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212002121220121 its reverse (121022121200212), we get a palindrome (333024242420333).

The spelling of 212002121220121 in words is "two hundred twelve trillion, two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred twenty-one".