12121231033021 has 16 divisors (see below), whose sum is σ = 13247811097920. Its totient is φ = 10998771678720.

The previous prime is 12121231033001. The next prime is 12121231033027. The reversal of 12121231033021 is 12033013212121.

It is a cyclic number.

It is not a de Polignac number, because 12121231033021 - 2⁹ = 12121231032509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121231032983 and 12121231033001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121231033027) 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, 19376691 + ... + 19992463.

It is an arithmetic number, because the mean of its divisors is an integer number (827988193620).

Almost surely, 2^{12121231033021} is an apocalyptic number.

12121231033021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12121231033021 is a deficient number, since it is larger than the sum of its proper divisors (1126580064899).

12121231033021 is a wasteful number, since it uses less digits than its factorization.

12121231033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619116.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 12121231033021 its reverse (12033013212121), we get a palindrome (24154244245142).

The spelling of 12121231033021 in words is "twelve trillion, one hundred twenty-one billion, two hundred thirty-one million, thirty-three thousand, twenty-one".