210012020120021 has 16 divisors (see below), whose sum is σ = 240864168321024. Its totient is φ = 179372491967664.

The previous prime is 210012020119997. The next prime is 210012020120051. The reversal of 210012020120021 is 120021020210012.

It is a cyclic number.

It is not a de Polignac number, because 210012020120021 - 2³⁰ = 210010946378197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210012020119978 and 210012020120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210012020120051) 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, 231131420 + ... + 232038266.

It is an arithmetic number, because the mean of its divisors is an integer number (15054010520064).

Almost surely, 2^{210012020120021} is an apocalyptic number.

It is an amenable number.

210012020120021 is a deficient number, since it is larger than the sum of its proper divisors (30852148201003).

210012020120021 is a wasteful number, since it uses less digits than its factorization.

210012020120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024040.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 210012020120021 its reverse (120021020210012), we get a palindrome (330033040330033).

The spelling of 210012020120021 in words is "two hundred ten trillion, twelve billion, twenty million, one hundred twenty thousand, twenty-one".