211202233121 has 6 divisors (see below), whose sum is σ = 232147909266. Its totient is φ = 192002030000.

The previous prime is 211202233103. The next prime is 211202233127. The reversal of 211202233121 is 121332202112.

It can be written as a sum of positive squares in only one way, i.e., 211062142225 + 140090896 = 459415^2 + 11836^2 .

It is not a de Polignac number, because 211202233121 - 2¹⁰ = 211202232097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202233093 and 211202233102.

It is not an unprimeable number, because it can be changed into a prime (211202233127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 872736380 + ... + 872736621.

It is an arithmetic number, because the mean of its divisors is an integer number (38691318211).

Almost surely, 2^211202233121 is an apocalyptic number.

It is an amenable number.

211202233121 is a deficient number, since it is larger than the sum of its proper divisors (20945676145).

211202233121 is a wasteful number, since it uses less digits than its factorization.

211202233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745473023 (or 1745473012 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 211202233121 its reverse (121332202112), we get a palindrome (332534435233).

The spelling of 211202233121 in words is "two hundred eleven billion, two hundred two million, two hundred thirty-three thousand, one hundred twenty-one".