30003131021221 has 2 divisors, whose sum is σ = 30003131021222. Its totient is φ = 30003131021220.

The previous prime is 30003131021191. The next prime is 30003131021233. The reversal of 30003131021221 is 12212013130003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24034368980196 + 5968762041025 = 4902486^2 + 2443105^2 .

It is a cyclic number.

It is not a de Polignac number, because 30003131021221 - 2⁴³ = 21207037999013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30003131021251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15001565510610 + 15001565510611.

It is an arithmetic number, because the mean of its divisors is an integer number (15001565510611).

Almost surely, 2^{30003131021221} is an apocalyptic number.

It is an amenable number.

30003131021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30003131021221 is an equidigital number, since it uses as much as digits as its factorization.

30003131021221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 30003131021221 its reverse (12212013130003), we get a palindrome (42215144151224).

The spelling of 30003131021221 in words is "thirty trillion, three billion, one hundred thirty-one million, twenty-one thousand, two hundred twenty-one".