211121200111021 has 8 divisors (see below), whose sum is σ = 211205974579200. Its totient is φ = 211036427176848.

The previous prime is 211121200110851. The next prime is 211121200111061. The reversal of 211121200111021 is 120111002121112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211121200111021 is a prime.

It is a super-2 number, since 2×211121200111021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121200110986 and 211121200111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121200111061) 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, 332804280 + ... + 333438046.

It is an arithmetic number, because the mean of its divisors is an integer number (26400746822400).

Almost surely, 2^{211121200111021} is an apocalyptic number.

It is an amenable number.

211121200111021 is a deficient number, since it is larger than the sum of its proper divisors (84774468179).

211121200111021 is a wasteful number, since it uses less digits than its factorization.

211121200111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767003.

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

Adding to 211121200111021 its reverse (120111002121112), we get a palindrome (331232202232133).

The spelling of 211121200111021 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred million, one hundred eleven thousand, twenty-one".