1211210111210 has 64 divisors (see below), whose sum is σ = 2584313856000. Its totient is φ = 403798996800.

The previous prime is 1211210111203. The next prime is 1211210111213. The reversal of 1211210111210 is 121110121121.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211210111213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9282410 + ... + 9411989.

It is an arithmetic number, because the mean of its divisors is an integer number (40379904000).

Almost surely, 2^{1211210111210} is an apocalyptic number.

1211210111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1211210111210 is an abundant number, since it is smaller than the sum of its proper divisors (1373103744790).

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

1211210111210 is a wasteful number, since it uses less digits than its factorization.

1211210111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18694467.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1211210111210 its reverse (121110121121), we get a palindrome (1332320232331).

The spelling of 1211210111210 in words is "one trillion, two hundred eleven billion, two hundred ten million, one hundred eleven thousand, two hundred ten".