1211200210 has 32 divisors (see below), whose sum is σ = 2380492800. Its totient is φ = 440040960.

The previous prime is 1211200187. The next prime is 1211200219. The reversal of 1211200210 is 120021121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1211200219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136386 + ... + 144994.

It is an arithmetic number, because the mean of its divisors is an integer number (74390400).

Almost surely, 2^1211200210 is an apocalyptic number.

1211200210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211200210 is a deficient number, since it is larger than the sum of its proper divisors (1169292590).

1211200210 is a wasteful number, since it uses less digits than its factorization.

1211200210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9906.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1211200210 is about 34802.3017916919. The cubic root of 1211200210 is about 1065.9544471873.

Adding to 1211200210 its reverse (120021121), we get a palindrome (1331221331).

Subtracting from 1211200210 its reverse (120021121), we obtain a square (1091179089 = 33033²).

The spelling of 1211200210 in words is "one billion, two hundred eleven million, two hundred thousand, two hundred ten".