1211211210 has 48 divisors (see below), whose sum is σ = 3195204768. Its totient is φ = 293626080.

The previous prime is 1211211203. The next prime is 1211211283. The reversal of 1211211210 is 121121121.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163204 + ... + 170463.

It is an arithmetic number, because the mean of its divisors is an integer number (66566766).

Almost surely, 2^1211211210 is an apocalyptic number.

1211211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211211210 is an abundant number, since it is smaller than the sum of its proper divisors (1983993558).

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

1211211210 is a wasteful number, since it uses less digits than its factorization.

1211211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333699 (or 333688 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1211211210 is about 34802.4598268571. The cubic root of 1211211210 is about 1065.9576741417.

Adding to 1211211210 its reverse (121121121), we get a palindrome (1332332331).

The spelling of 1211211210 in words is "one billion, two hundred eleven million, two hundred eleven thousand, two hundred ten".