30231111661 has 2 divisors, whose sum is σ = 30231111662. Its totient is φ = 30231111660.

The previous prime is 30231111583. The next prime is 30231111689. The reversal of 30231111661 is 16611113203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28153484100 + 2077627561 = 167790^2 + 45581^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231111661 - 2²⁹ = 29694240749 is a prime.

It is a super-2 number, since 2×30231111661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30231117661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115555830 + 15115555831.

It is an arithmetic number, because the mean of its divisors is an integer number (15115555831).

Almost surely, 2^30231111661 is an apocalyptic number.

It is an amenable number.

30231111661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30231111661 is an equidigital number, since it uses as much as digits as its factorization.

30231111661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

Adding to 30231111661 its reverse (16611113203), we get a palindrome (46842224864).

The spelling of 30231111661 in words is "thirty billion, two hundred thirty-one million, one hundred eleven thousand, six hundred sixty-one".