1213100211 has 4 divisors (see below), whose sum is σ = 1617466952. Its totient is φ = 808733472.

The previous prime is 1213100183. The next prime is 1213100233. The reversal of 1213100211 is 1120013121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1213100211 - 2⁵ = 1213100179 is a prime.

It is a super-2 number, since 2×1213100211² = 2943224243856489042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213100311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202183366 + ... + 202183371.

It is an arithmetic number, because the mean of its divisors is an integer number (404366738).

Almost surely, 2^1213100211 is an apocalyptic number.

1213100211 is a deficient number, since it is larger than the sum of its proper divisors (404366741).

1213100211 is an equidigital number, since it uses as much as digits as its factorization.

1213100211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404366740.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1213100211 is about 34829.5881543265. The cubic root of 1213100211 is about 1066.5115409936.

Adding to 1213100211 its reverse (1120013121), we get a palindrome (2333113332).

The spelling of 1213100211 in words is "one billion, two hundred thirteen million, one hundred thousand, two hundred eleven".