121121121211210 has 32 divisors (see below), whose sum is σ = 218099543040720. Its totient is φ = 48430332905472.

The previous prime is 121121121211171. The next prime is 121121121211219. The reversal of 121121121211210 is 12112121121121.

It can be written as a sum of positive squares in 8 ways, for example, as 116487963975681 + 4633157235529 = 10792959^2 + 2152477^2 .

It is not an unprimeable number, because it can be changed into a prime (121121121211219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1757662236 + ... + 1757731144.

Almost surely, 2^{121121121211210} is an apocalyptic number.

121121121211210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121121211210 is a deficient number, since it is larger than the sum of its proper divisors (96978421829510).

121121121211210 is a wasteful number, since it uses less digits than its factorization.

121121121211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132090.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 121121121211210 its reverse (12112121121121), we get a palindrome (133233242332331).

The spelling of 121121121211210 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred eleven thousand, two hundred ten".