21121102303211 has 4 divisors (see below), whose sum is σ = 21169214154000. Its totient is φ = 21072990452424.

The previous prime is 21121102303207. The next prime is 21121102303229. The reversal of 21121102303211 is 11230320112112.

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 21121102303211 - 2² = 21121102303207 is a prime.

It is a super-2 number, since 2×21121102303211² (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 (21121102903211) 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, 24055924736 + ... + 24055925613.

It is an arithmetic number, because the mean of its divisors is an integer number (5292303538500).

Almost surely, 2^{21121102303211} is an apocalyptic number.

21121102303211 is a deficient number, since it is larger than the sum of its proper divisors (48111850789).

21121102303211 is an equidigital number, since it uses as much as digits as its factorization.

21121102303211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48111850788.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21121102303211 its reverse (11230320112112), we get a palindrome (32351422415323).

The spelling of 21121102303211 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred two million, three hundred three thousand, two hundred eleven".