202201221020121 has 48 divisors (see below), whose sum is σ = 295796676943872. Its totient is φ = 133092873900000.

The previous prime is 202201221020119. The next prime is 202201221020137. The reversal of 202201221020121 is 121020122102202.

It is a happy number.

202201221020121 is a `hidden beast` number, since 2 + 0 + 220 + 1 + 221 + 0 + 201 + 21 = 666.

It is not a de Polignac number, because 202201221020121 - 2¹ = 202201221020119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202201221020094 and 202201221020103.

It is not an unprimeable number, because it can be changed into a prime (202201221020521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207700746 + ... + 208671996.

It is an arithmetic number, because the mean of its divisors is an integer number (6162430769664).

Almost surely, 2^{202201221020121} is an apocalyptic number.

It is an amenable number.

202201221020121 is a deficient number, since it is larger than the sum of its proper divisors (93595455923751).

202201221020121 is a wasteful number, since it uses less digits than its factorization.

202201221020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972354 (or 972351 counting only the distinct ones).

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

Adding to 202201221020121 its reverse (121020122102202), we get a palindrome (323221343122323).

The spelling of 202201221020121 in words is "two hundred two trillion, two hundred one billion, two hundred twenty-one million, twenty thousand, one hundred twenty-one".