12102121254 has 32 divisors (see below), whose sum is σ = 25131363840. Its totient is φ = 3880548000.

The previous prime is 12102121253. The next prime is 12102121261. The reversal of 12102121254 is 45212120121.

It is a super-2 number, since 2×12102121254² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12102121254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102121253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81172 + ... + 175479.

It is an arithmetic number, because the mean of its divisors is an integer number (785355120).

Almost surely, 2^12102121254 is an apocalyptic number.

12102121254 is an abundant number, since it is smaller than the sum of its proper divisors (13029242586).

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

12102121254 is a wasteful number, since it uses less digits than its factorization.

12102121254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256956.

The product of its (nonzero) digits is 320, while the sum is 21.

Adding to 12102121254 its reverse (45212120121), we get a palindrome (57314241375).

The spelling of 12102121254 in words is "twelve billion, one hundred two million, one hundred twenty-one thousand, two hundred fifty-four".