30121021373 has 2 divisors, whose sum is σ = 30121021374. Its totient is φ = 30121021372.

The previous prime is 30121021339. The next prime is 30121021397. The reversal of 30121021373 is 37312012103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24745492249 + 5375529124 = 157307^2 + 73318^2 .

It is a cyclic number.

It is not a de Polignac number, because 30121021373 - 2¹⁴ = 30121004989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30121021313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15060510686 + 15060510687.

It is an arithmetic number, because the mean of its divisors is an integer number (15060510687).

Almost surely, 2^30121021373 is an apocalyptic number.

It is an amenable number.

30121021373 is a deficient number, since it is larger than the sum of its proper divisors (1).

30121021373 is an equidigital number, since it uses as much as digits as its factorization.

30121021373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

Adding to 30121021373 its reverse (37312012103), we get a palindrome (67433033476).

The spelling of 30121021373 in words is "thirty billion, one hundred twenty-one million, twenty-one thousand, three hundred seventy-three".