120212013821 has 2 divisors, whose sum is σ = 120212013822. Its totient is φ = 120212013820.

The previous prime is 120212013809. The next prime is 120212013829. The reversal of 120212013821 is 128310212021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75728985721 + 44483028100 = 275189^2 + 210910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120212013821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120212013829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60106006910 + 60106006911.

It is an arithmetic number, because the mean of its divisors is an integer number (60106006911).

Almost surely, 2^120212013821 is an apocalyptic number.

It is an amenable number.

120212013821 is a deficient number, since it is larger than the sum of its proper divisors (1).

120212013821 is an equidigital number, since it uses as much as digits as its factorization.

120212013821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 120212013821 its reverse (128310212021), we get a palindrome (248522225842).

The spelling of 120212013821 in words is "one hundred twenty billion, two hundred twelve million, thirteen thousand, eight hundred twenty-one".