121312021020102 has 24 divisors (see below), whose sum is σ = 286737504229800. Its totient is φ = 36761218490880.

The previous prime is 121312021020101. The next prime is 121312021020163. The reversal of 121312021020102 is 201020120213121.

121312021020102 is a `hidden beast` number, since 1 + 21 + 312 + 0 + 210 + 20 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312021020101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306343487227 + ... + 306343487622.

It is an arithmetic number, because the mean of its divisors is an integer number (11947396009575).

Almost surely, 2^{121312021020102} is an apocalyptic number.

121312021020102 is an abundant number, since it is smaller than the sum of its proper divisors (165425483209698).

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

121312021020102 is a wasteful number, since it uses less digits than its factorization.

121312021020102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612686974868 (or 612686974865 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121312021020102 its reverse (201020120213121), we get a palindrome (322332141233223).

It can be divided in two parts, 1213120 and 21020102, that added together give a palindrome (22233222).

The spelling of 121312021020102 in words is "one hundred twenty-one trillion, three hundred twelve billion, twenty-one million, twenty thousand, one hundred two".