211121010121 has 8 divisors (see below), whose sum is σ = 241650656064. Its totient is φ = 180683739600.

The previous prime is 211121010077. The next prime is 211121010137. The reversal of 211121010121 is 121010121112.

It is a happy number.

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

It is not a de Polignac number, because 211121010121 - 2⁹ = 211121009609 is a prime.

It is a super-2 number, since 2×211121010121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211121010421) 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, 23088955 + ... + 23098096.

It is an arithmetic number, because the mean of its divisors is an integer number (30206332008).

Almost surely, 2^211121010121 is an apocalyptic number.

It is an amenable number.

211121010121 is a deficient number, since it is larger than the sum of its proper divisors (30529645943).

211121010121 is an equidigital number, since it uses as much as digits as its factorization.

211121010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46187711.

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

Adding to 211121010121 its reverse (121010121112), we get a palindrome (332131131233).

The spelling of 211121010121 in words is "two hundred eleven billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".