121121112011210 has 8 divisors (see below), whose sum is σ = 218018001620196. Its totient is φ = 48448444804480.

The previous prime is 121121112011191. The next prime is 121121112011267. The reversal of 121121112011210 is 12110211121121.

It can be written as a sum of positive squares in 2 ways, for example, as 114636872473321 + 6484239537889 = 10706861^2 + 2546417^2 .

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, 6056055600551 + ... + 6056055600570.

Almost surely, 2^{121121112011210} is an apocalyptic number.

121121112011210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121121112011210 is a deficient number, since it is larger than the sum of its proper divisors (96896889608986).

121121112011210 is a wasteful number, since it uses less digits than its factorization.

121121112011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12112111201128.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 121121112011210 its reverse (12110211121121), we get a palindrome (133231323132331).

The spelling of 121121112011210 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred twelve million, eleven thousand, two hundred ten".