21120202122211 has 8 divisors (see below), whose sum is σ = 21225461433344. Its totient is φ = 21015037006920.

The previous prime is 21120202122193. The next prime is 21120202122221. The reversal of 21120202122211 is 11222120202112.

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 21120202122211 - 2⁵ = 21120202122179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21120202122221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23099391 + ... + 23996296.

It is an arithmetic number, because the mean of its divisors is an integer number (2653182679168).

Almost surely, 2^{21120202122211} is an apocalyptic number.

21120202122211 is a deficient number, since it is larger than the sum of its proper divisors (105259311133).

21120202122211 is a wasteful number, since it uses less digits than its factorization.

21120202122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47097921.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21120202122211 its reverse (11222120202112), we get a palindrome (32342322324323).

The spelling of 21120202122211 in words is "twenty-one trillion, one hundred twenty billion, two hundred two million, one hundred twenty-two thousand, two hundred eleven".