12021012000021 has 32 divisors (see below), whose sum is σ = 16173714216960. Its totient is φ = 7941579430400.

The previous prime is 12021011999987. The next prime is 12021012000061. The reversal of 12021012000021 is 12000021012021.

It is a cyclic number.

It is not a de Polignac number, because 12021012000021 - 2¹⁰ = 12021011998997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021011999970 and 12021012000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021012000061) 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, 124224226 + ... + 124320956.

It is an arithmetic number, because the mean of its divisors is an integer number (505428569280).

Almost surely, 2^{12021012000021} is an apocalyptic number.

It is an amenable number.

12021012000021 is a deficient number, since it is larger than the sum of its proper divisors (4152702216939).

12021012000021 is a wasteful number, since it uses less digits than its factorization.

12021012000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97817.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12021012000021 its reverse (12000021012021), we get a palindrome (24021033012042).

The spelling of 12021012000021 in words is "twelve trillion, twenty-one billion, twelve million, twenty-one", and thus it is an aban number and an uban number.