211201212100 has 18 divisors (see below), whose sum is σ = 458306630474. Its totient is φ = 84480484800.

The previous prime is 211201212049. The next prime is 211201212107. The reversal of 211201212100 is 1212102112.

It can be written as a sum of positive squares in 3 ways, for example, as 48295336644 + 162905875456 = 219762^2 + 403616^2 .

It is not an unprimeable number, because it can be changed into a prime (211201212107) 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, 1056005961 + ... + 1056006160.

Almost surely, 2^211201212100 is an apocalyptic number.

211201212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201212100 is an abundant number, since it is smaller than the sum of its proper divisors (247105418374).

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

211201212100 is a wasteful number, since it uses less digits than its factorization.

211201212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112012135 (or 2112012128 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211201212100 its reverse (1212102112), we get a palindrome (212413314212).

The spelling of 211201212100 in words is "two hundred eleven billion, two hundred one million, two hundred twelve thousand, one hundred".