211011320021 has 8 divisors (see below), whose sum is σ = 211479776640. Its totient is φ = 210543112512.

The previous prime is 211011319973. The next prime is 211011320041. The reversal of 211011320021 is 120023110112.

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 211011320021 - 2³⁰ = 209937578197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211011319978 and 211011320005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211011320041) 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, 1688045 + ... + 1808733.

It is an arithmetic number, because the mean of its divisors is an integer number (26434972080).

Almost surely, 2^211011320021 is an apocalyptic number.

It is an amenable number.

211011320021 is a deficient number, since it is larger than the sum of its proper divisors (468456619).

211011320021 is a wasteful number, since it uses less digits than its factorization.

211011320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124555.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 211011320021 its reverse (120023110112), we get a palindrome (331034430133).

The spelling of 211011320021 in words is "two hundred eleven billion, eleven million, three hundred twenty thousand, twenty-one".