211201202120 has 32 divisors (see below), whose sum is σ = 475446699000. Its totient is φ = 84437104128.

The previous prime is 211201202101. The next prime is 211201202123. The reversal of 211201202120 is 21202102112.

It can be written as a sum of positive squares in 4 ways, for example, as 170276721316 + 40924480804 = 412646^2 + 202298^2 .

It is a junction number, because it is equal to n+sod(n) for n = 211201202095 and 211201202104.

It is not an unprimeable number, because it can be changed into a prime (211201202123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276589 + ... + 1432508.

Almost surely, 2^211201202120 is an apocalyptic number.

211201202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201202120 is an abundant number, since it is smaller than the sum of its proper divisors (264245496880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211201202120 is a wasteful number, since it uses less digits than its factorization.

211201202120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2711057 (or 2711053 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211201202120 its reverse (21202102112), we get a palindrome (232403304232).

The spelling of 211201202120 in words is "two hundred eleven billion, two hundred one million, two hundred two thousand, one hundred twenty".