210221020121001 has 16 divisors (see below), whose sum is σ = 292486098952320. Its totient is φ = 134051839004160.

The previous prime is 210221020120963. The next prime is 210221020121051. The reversal of 210221020121001 is 100121020122012.

It is not a de Polignac number, because 210221020121001 - 2²⁶ = 210220953012137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210221020121051) 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, 20023816 + ... + 28659993.

It is an arithmetic number, because the mean of its divisors is an integer number (18280381184520).

Almost surely, 2^{210221020121001} is an apocalyptic number.

It is an amenable number.

210221020121001 is a deficient number, since it is larger than the sum of its proper divisors (82265078831319).

210221020121001 is a wasteful number, since it uses less digits than its factorization.

210221020121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48746416.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 210221020121001 its reverse (100121020122012), we get a palindrome (310342040243013).

The spelling of 210221020121001 in words is "two hundred ten trillion, two hundred twenty-one billion, twenty million, one hundred twenty-one thousand, one".