211202112121 has 144 divisors (see below), whose sum is σ = 302480559360. Its totient is φ = 143469216000.

The previous prime is 211202112113. The next prime is 211202112133. The reversal of 211202112121 is 121211202112.

It is not a de Polignac number, because 211202112121 - 2³ = 211202112113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211202112095 and 211202112104.

It is not an unprimeable number, because it can be changed into a prime (211202112181) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 588306540 + ... + 588306898.

It is an arithmetic number, because the mean of its divisors is an integer number (2100559440).

Almost surely, 2^211202112121 is an apocalyptic number.

It is an amenable number.

211202112121 is a deficient number, since it is larger than the sum of its proper divisors (91278447239).

211202112121 is a wasteful number, since it uses less digits than its factorization.

211202112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 514 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211202112121 its reverse (121211202112), we get a palindrome (332413314233).

It can be divided in two parts, 211202112 and 121, that multiplied together give a palindrome (25555455552).

The spelling of 211202112121 in words is "two hundred eleven billion, two hundred two million, one hundred twelve thousand, one hundred twenty-one".