30212121031 has 2 divisors, whose sum is σ = 30212121032. Its totient is φ = 30212121030.

The previous prime is 30212121029. The next prime is 30212121073. The reversal of 30212121031 is 13012121203.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30212121031 - 2¹ = 30212121029 is a prime.

It is a super-2 number, since 2×30212121031² (a number of 22 digits) contains 22 as substring.

Together with 30212121029, it forms a pair of twin primes.

It is a zygodrome in base 5.

It is a junction number, because it is equal to n+sod(n) for n = 30212120996 and 30212121014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30212128031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106060515 + 15106060516.

It is an arithmetic number, because the mean of its divisors is an integer number (15106060516).

Almost surely, 2^30212121031 is an apocalyptic number.

30212121031 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212121031 is an equidigital number, since it uses as much as digits as its factorization.

30212121031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30212121031 its reverse (13012121203), we get a palindrome (43224242234).

The spelling of 30212121031 in words is "thirty billion, two hundred twelve million, one hundred twenty-one thousand, thirty-one".