12121011211110 has 32 divisors (see below), whose sum is σ = 29268895795200. Its totient is φ = 3212439779808.

The previous prime is 12121011211039. The next prime is 12121011211117. The reversal of 12121011211110 is 1111211012121.

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 12121011211110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121011211117) 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, 1239362310 + ... + 1239372089.

It is an arithmetic number, because the mean of its divisors is an integer number (914652993600).

Almost surely, 2^{12121011211110} is an apocalyptic number.

12121011211110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121011211110 is an abundant number, since it is smaller than the sum of its proper divisors (17147884584090).

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

12121011211110 is a wasteful number, since it uses less digits than its factorization.

12121011211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478734572.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12121011211110 its reverse (1111211012121), we get a palindrome (13232222223231).

The spelling of 12121011211110 in words is "twelve trillion, one hundred twenty-one billion, eleven million, two hundred eleven thousand, one hundred ten".