21200010210121 has 8 divisors (see below), whose sum is σ = 22316477752800. Its totient is φ = 20083610420640.

The previous prime is 21200010210107. The next prime is 21200010210133. The reversal of 21200010210121 is 12101201000212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21200010210121 - 2⁷ = 21200010209993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200010270121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16295395 + ... + 17548216.

It is an arithmetic number, because the mean of its divisors is an integer number (2789559719100).

Almost surely, 2^{21200010210121} is an apocalyptic number.

It is an amenable number.

21200010210121 is a deficient number, since it is larger than the sum of its proper divisors (1116467542679).

21200010210121 is a wasteful number, since it uses less digits than its factorization.

21200010210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33876599.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200010210121 its reverse (12101201000212), we get a palindrome (33301211210333).

The spelling of 21200010210121 in words is "twenty-one trillion, two hundred billion, ten million, two hundred ten thousand, one hundred twenty-one".