21121101210011 has 8 divisors (see below), whose sum is σ = 23041829979504. Its totient is φ = 19200477217120.

The previous prime is 21121101210007. The next prime is 21121101210017. The reversal of 21121101210011 is 11001210112112.

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 21121101210011 - 2² = 21121101210007 is a prime.

It is a super-2 number, since 2×21121101210011² (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 (21121101210017) 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, 25772360 + ... + 26579253.

It is an arithmetic number, because the mean of its divisors is an integer number (2880228747438).

Almost surely, 2^{21121101210011} is an apocalyptic number.

21121101210011 is a deficient number, since it is larger than the sum of its proper divisors (1920728769493).

21121101210011 is a wasteful number, since it uses less digits than its factorization.

21121101210011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52388301.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21121101210011 its reverse (11001210112112), we get a palindrome (32122311322123).

The spelling of 21121101210011 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred one million, two hundred ten thousand, eleven".