201121210212021 has 24 divisors (see below), whose sum is σ = 317781808216704. Its totient is φ = 121559512714560.

The previous prime is 201121210211993. The next prime is 201121210212089. The reversal of 201121210212021 is 120212012121102.

201121210212021 is a `hidden beast` number, since 201 + 1 + 21 + 210 + 212 + 0 + 21 = 666.

It is not a de Polignac number, because 201121210212021 - 2¹⁹ = 201121209687733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201121210211985 and 201121210212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121210212421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2767712136 + ... + 2767784801.

It is an arithmetic number, because the mean of its divisors is an integer number (13240908675696).

Almost surely, 2^{201121210212021} is an apocalyptic number.

It is an amenable number.

201121210212021 is a deficient number, since it is larger than the sum of its proper divisors (116660598004683).

201121210212021 is a wasteful number, since it uses less digits than its factorization.

201121210212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535497321 (or 5535497318 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 201121210212021 its reverse (120212012121102), we get a palindrome (321333222333123).

The spelling of 201121210212021 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, twenty-one".