12121311002021 has 32 divisors (see below), whose sum is σ = 14236240354560. Its totient is φ = 10226848794624.

The previous prime is 12121311002011. The next prime is 12121311002023. The reversal of 12121311002021 is 12020011312121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12121311002021 - 2⁴² = 7723264490917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121311002023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6364655 + ... + 8046828.

It is an arithmetic number, because the mean of its divisors is an integer number (444882511080).

Almost surely, 2^{12121311002021} is an apocalyptic number.

It is an amenable number.

12121311002021 is a deficient number, since it is larger than the sum of its proper divisors (2114929352539).

12121311002021 is a wasteful number, since it uses less digits than its factorization.

12121311002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14411645.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12121311002021 its reverse (12020011312121), we get a palindrome (24141322314142).

The spelling of 12121311002021 in words is "twelve trillion, one hundred twenty-one billion, three hundred eleven million, two thousand, twenty-one".