21121201000211 has 8 divisors (see below), whose sum is σ = 22925010415104. Its totient is φ = 19342977534720.

The previous prime is 21121201000189. The next prime is 21121201000217. The reversal of 21121201000211 is 11200010212112.

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 21121201000211 - 2⁶ = 21121201000147 is a prime.

It is a super-2 number, since 2×21121201000211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21121201000217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6396485630 + ... + 6396488931.

It is an arithmetic number, because the mean of its divisors is an integer number (2865626301888).

Almost surely, 2^{21121201000211} is an apocalyptic number.

21121201000211 is a deficient number, since it is larger than the sum of its proper divisors (1803809414893).

21121201000211 is a wasteful number, since it uses less digits than its factorization.

21121201000211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12792974701.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21121201000211 its reverse (11200010212112), we get a palindrome (32321211212323).

The spelling of 21121201000211 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred one million, two hundred eleven", and thus it is an aban number.