1211011210 has 32 divisors (see below), whose sum is σ = 2205425232. Its totient is φ = 478732800.

The previous prime is 1211011199. The next prime is 1211011211. The reversal of 1211011210 is 121101121.

It can be written as a sum of positive squares in 8 ways, for example, as 1074331729 + 136679481 = 32777^2 + 11691^2 .

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 (1211011211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1103382 + ... + 1104478.

Almost surely, 2^1211011210 is an apocalyptic number.

1211011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211011210 is a deficient number, since it is larger than the sum of its proper divisors (994414022).

1211011210 is a wasteful number, since it uses less digits than its factorization.

1211011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1211011210 is about 34799.5863481163. The cubic root of 1211011210 is about 1065.8989991921.

1211011210 divided by its sum of digits (10) gives a palindrome (121101121).

Adding to 1211011210 its reverse (121101121), we get a palindrome (1332112331).

The spelling of 1211011210 in words is "one billion, two hundred eleven million, eleven thousand, two hundred ten".