30100131221 has 2 divisors, whose sum is σ = 30100131222. Its totient is φ = 30100131220.

The previous prime is 30100131179. The next prime is 30100131239. The reversal of 30100131221 is 12213100103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30097392196 + 2739025 = 173486^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 30100131221 - 2¹⁸ = 30099869077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30100131196 and 30100131205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30100131821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15050065610 + 15050065611.

It is an arithmetic number, because the mean of its divisors is an integer number (15050065611).

Almost surely, 2^30100131221 is an apocalyptic number.

It is an amenable number.

30100131221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30100131221 is an equidigital number, since it uses as much as digits as its factorization.

30100131221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 30100131221 its reverse (12213100103), we get a palindrome (42313231324).

The spelling of 30100131221 in words is "thirty billion, one hundred million, one hundred thirty-one thousand, two hundred twenty-one".