1211210212210 has 8 divisors (see below), whose sum is σ = 2180178381996. Its totient is φ = 484484084880.

The previous prime is 1211210212207. The next prime is 1211210212229. The reversal of 1211210212210 is 122120121121.

It can be written as a sum of positive squares in 2 ways, for example, as 1158703697761 + 52506514449 = 1076431^2 + 229143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60560510601 + ... + 60560510620.

Almost surely, 2^{1211210212210} is an apocalyptic number.

1211210212210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211210212210 is a deficient number, since it is larger than the sum of its proper divisors (968968169786).

1211210212210 is a wasteful number, since it uses less digits than its factorization.

1211210212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121121021228.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1211210212210 its reverse (122120121121), we get a palindrome (1333330333331).

The spelling of 1211210212210 in words is "one trillion, two hundred eleven billion, two hundred ten million, two hundred twelve thousand, two hundred ten".