12121121010210 has 64 divisors (see below), whose sum is σ = 29873081871360. Its totient is φ = 3145752069120.

The previous prime is 12121121010197. The next prime is 12121121010223. The reversal of 12121121010210 is 1201012112121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12121121010197) and next prime (12121121010223).

It is a super-3 number, since 3×12121121010210³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12121121010210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11544082 + ... + 12550221.

It is an arithmetic number, because the mean of its divisors is an integer number (466766904240).

Almost surely, 2^{12121121010210} is an apocalyptic number.

12121121010210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121121010210 is an abundant number, since it is smaller than the sum of its proper divisors (17751960861150).

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

12121121010210 is a wasteful number, since it uses less digits than its factorization.

12121121010210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24094763.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12121121010210 its reverse (1201012112121), we get a palindrome (13322133122331).

The spelling of 12121121010210 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-one million, ten thousand, two hundred ten".