202021102012221 has 24 divisors (see below), whose sum is σ = 309035208942720. Its totient is φ = 126733001571456.

The previous prime is 202021102012211. The next prime is 202021102012231. The reversal of 202021102012221 is 122210201120202.

It is a happy number.

202021102012221 is a `hidden beast` number, since 202 + 0 + 211 + 0 + 20 + 12 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (202021102012211) and next prime (202021102012231).

It is not a de Polignac number, because 202021102012221 - 2¹⁴ = 202021101995837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202021102012194 and 202021102012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021102012211) 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, 131195301 + ... + 132726218.

It is an arithmetic number, because the mean of its divisors is an integer number (12876467039280).

Almost surely, 2^{202021102012221} is an apocalyptic number.

It is an amenable number.

202021102012221 is a deficient number, since it is larger than the sum of its proper divisors (107014106930499).

202021102012221 is a wasteful number, since it uses less digits than its factorization.

202021102012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263926545 (or 263926542 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 202021102012221 its reverse (122210201120202), we get a palindrome (324231303132423).

The spelling of 202021102012221 in words is "two hundred two trillion, twenty-one billion, one hundred two million, twelve thousand, two hundred twenty-one".