212202201220121 has 16 divisors (see below), whose sum is σ = 257009938179840. Its totient is φ = 171036702005760.

The previous prime is 212202201220117. The next prime is 212202201220151. The reversal of 212202201220121 is 121022102202212.

It is a cyclic number.

It is not a de Polignac number, because 212202201220121 - 2² = 212202201220117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212202201220093 and 212202201220102.

It is not an unprimeable number, because it can be changed into a prime (212202201220151) 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, 789596285 + ... + 789864986.

It is an arithmetic number, because the mean of its divisors is an integer number (16063121136240).

Almost surely, 2^{212202201220121} is an apocalyptic number.

It is an amenable number.

212202201220121 is a deficient number, since it is larger than the sum of its proper divisors (44807736959719).

212202201220121 is a wasteful number, since it uses less digits than its factorization.

212202201220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579462424.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212202201220121 its reverse (121022102202212), we get a palindrome (333224303422333).

The spelling of 212202201220121 in words is "two hundred twelve trillion, two hundred two billion, two hundred one million, two hundred twenty thousand, one hundred twenty-one".