21120100121011 has 8 divisors (see below), whose sum is σ = 21185077274624. Its totient is φ = 21055163344200.

The previous prime is 21120100121009. The next prime is 21120100121059. The reversal of 21120100121011 is 11012100102112.

It is a happy number.

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 21120100121011 - 2¹ = 21120100121009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21120100120982 and 21120100121000.

It is not an unprimeable number, because it can be changed into a prime (21120100121311) 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, 9046275 + ... + 11138908.

It is an arithmetic number, because the mean of its divisors is an integer number (2648134659328).

Almost surely, 2^{21120100121011} is an apocalyptic number.

21120100121011 is a deficient number, since it is larger than the sum of its proper divisors (64977153613).

21120100121011 is a wasteful number, since it uses less digits than its factorization.

21120100121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20188401.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21120100121011 its reverse (11012100102112), we get a palindrome (32132200223123).

The spelling of 21120100121011 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, one hundred twenty-one thousand, eleven".