202201212202121 has 16 divisors (see below), whose sum is σ = 222768949569408. Its totient is φ = 181997806032000.

The previous prime is 202201212202079. The next prime is 202201212202151. The reversal of 202201212202121 is 121202212102202.

It is a cyclic number.

It is not a de Polignac number, because 202201212202121 - 2³⁸ = 201926334295177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202201212202093 and 202201212202102.

It is not an unprimeable number, because it can be changed into a prime (202201212202151) 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, 149095541 + ... + 150445613.

It is an arithmetic number, because the mean of its divisors is an integer number (13923059348088).

Almost surely, 2^{202201212202121} is an apocalyptic number.

It is an amenable number.

202201212202121 is a deficient number, since it is larger than the sum of its proper divisors (20567737367287).

202201212202121 is a wasteful number, since it uses less digits than its factorization.

202201212202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484992.

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

Adding to 202201212202121 its reverse (121202212102202), we get a palindrome (323403424304323).

The spelling of 202201212202121 in words is "two hundred two trillion, two hundred one billion, two hundred twelve million, two hundred two thousand, one hundred twenty-one".