211011021121 has 8 divisors (see below), whose sum is σ = 211726920584. Its totient is φ = 210295388160.

The previous prime is 211011021077. The next prime is 211011021157. The reversal of 211011021121 is 121120110112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 53159758096 + 157851263025 = 230564^2 + 397305^2 .

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 211011021121 - 2⁷ = 211011020993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211011021421) 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, 1589125 + ... + 1716781.

It is an arithmetic number, because the mean of its divisors is an integer number (26465865073).

Almost surely, 2^211011021121 is an apocalyptic number.

It is an amenable number.

211011021121 is a deficient number, since it is larger than the sum of its proper divisors (715899463).

211011021121 is a wasteful number, since it uses less digits than its factorization.

211011021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133251.

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

Adding to 211011021121 its reverse (121120110112), we get a palindrome (332131131233).

The spelling of 211011021121 in words is "two hundred eleven billion, eleven million, twenty-one thousand, one hundred twenty-one".