211210120121 has 128 divisors (see below), whose sum is σ = 308558315520. Its totient is φ = 139072204800.

The previous prime is 211210120103. The next prime is 211210120193. The reversal of 211210120121 is 121021012112.

It is a cyclic number.

It is not a de Polignac number, because 211210120121 - 2³⁴ = 194030250937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211210120096 and 211210120105.

It is not an unprimeable number, because it can be changed into a prime (211210120021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 144762890 + ... + 144764348.

It is an arithmetic number, because the mean of its divisors is an integer number (2410611840).

Almost surely, 2^211210120121 is an apocalyptic number.

It is an amenable number.

211210120121 is a deficient number, since it is larger than the sum of its proper divisors (97348195399).

211210120121 is a wasteful number, since it uses less digits than its factorization.

211210120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211210120121 its reverse (121021012112), we get a palindrome (332231132233).

The spelling of 211210120121 in words is "two hundred eleven billion, two hundred ten million, one hundred twenty thousand, one hundred twenty-one".