21010202120001 has 16 divisors (see below), whose sum is σ = 31222591387200. Its totient is φ = 12489036553728.

The previous prime is 21010202119981. The next prime is 21010202120029. The reversal of 21010202120001 is 10002120201012.

It is not a de Polignac number, because 21010202120001 - 2⁶ = 21010202119937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010202120071) 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, 10841176596 + ... + 10841178533.

It is an arithmetic number, because the mean of its divisors is an integer number (1951411961700).

Almost surely, 2^{21010202120001} is an apocalyptic number.

It is an amenable number.

21010202120001 is a deficient number, since it is larger than the sum of its proper divisors (10212389267199).

21010202120001 is a wasteful number, since it uses less digits than its factorization.

21010202120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21682355168.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21010202120001 its reverse (10002120201012), we get a palindrome (31012322321013).

The spelling of 21010202120001 in words is "twenty-one trillion, ten billion, two hundred two million, one hundred twenty thousand, one".