21121100201211 has 8 divisors (see below), whose sum is σ = 28419829017360. Its totient is φ = 13951552426272.

The previous prime is 21121100201197. The next prime is 21121100201213. The reversal of 21121100201211 is 11210200112112.

It is a happy number.

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

It is not a de Polignac number, because 21121100201211 - 2¹¹ = 21121100199163 is a prime.

It is a super-2 number, since 2×21121100201211² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21121100201213) 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, 32295259920 + ... + 32295260573.

It is an arithmetic number, because the mean of its divisors is an integer number (3552478627170).

Almost surely, 2^{21121100201211} is an apocalyptic number.

21121100201211 is a deficient number, since it is larger than the sum of its proper divisors (7298728816149).

21121100201211 is a wasteful number, since it uses less digits than its factorization.

21121100201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64590520605.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121100201211 its reverse (11210200112112), we get a palindrome (32331300313323).

The spelling of 21121100201211 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred million, two hundred one thousand, two hundred eleven".