120212200021 has 2 divisors, whose sum is σ = 120212200022. Its totient is φ = 120212200020.

The previous prime is 120212200019. The next prime is 120212200057. The reversal of 120212200021 is 120002212021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119677943025 + 534256996 = 345945^2 + 23114^2 .

It is an emirp because it is prime and its reverse (120002212021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120212200021 - 2¹ = 120212200019 is a prime.

Together with 120212200019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 120212199974 and 120212200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120212200421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60106100010 + 60106100011.

It is an arithmetic number, because the mean of its divisors is an integer number (60106100011).

Almost surely, 2^120212200021 is an apocalyptic number.

It is an amenable number.

120212200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

120212200021 is an equidigital number, since it uses as much as digits as its factorization.

120212200021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120212200021 its reverse (120002212021), we get a palindrome (240214412042).

The spelling of 120212200021 in words is "one hundred twenty billion, two hundred twelve million, two hundred thousand, twenty-one".