21210002121201 has 32 divisors (see below), whose sum is σ = 29076342142848. Its totient is φ = 13742682808320.

The previous prime is 21210002121179. The next prime is 21210002121271. The reversal of 21210002121201 is 10212120001212.

It is not a de Polignac number, because 21210002121201 - 2³¹ = 21207854637553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21210002121271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380892081 + ... + 380947761.

It is an arithmetic number, because the mean of its divisors is an integer number (908635691964).

Almost surely, 2^{21210002121201} is an apocalyptic number.

It is an amenable number.

21210002121201 is a deficient number, since it is larger than the sum of its proper divisors (7866340021647).

21210002121201 is a wasteful number, since it uses less digits than its factorization.

21210002121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59441.

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

Adding to 21210002121201 its reverse (10212120001212), we get a palindrome (31422122122413).

The spelling of 21210002121201 in words is "twenty-one trillion, two hundred ten billion, two million, one hundred twenty-one thousand, two hundred one".