21140121000211 has 4 divisors (see below), whose sum is σ = 21455645194312. Its totient is φ = 20824596806112.

The previous prime is 21140121000143. The next prime is 21140121000263. The reversal of 21140121000211 is 11200012104112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21140121000211 - 2⁷ = 21140121000083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140121009211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157762096950 + ... + 157762097083.

It is an arithmetic number, because the mean of its divisors is an integer number (5363911298578).

Almost surely, 2^{21140121000211} is an apocalyptic number.

21140121000211 is a deficient number, since it is larger than the sum of its proper divisors (315524194101).

21140121000211 is an equidigital number, since it uses as much as digits as its factorization.

21140121000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315524194100.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21140121000211 its reverse (11200012104112), we get a palindrome (32340133104323).

The spelling of 21140121000211 in words is "twenty-one trillion, one hundred forty billion, one hundred twenty-one million, two hundred eleven", and thus it is an aban number.