30220120100021 has 2 divisors, whose sum is σ = 30220120100022. Its totient is φ = 30220120100020.

The previous prime is 30220120099987. The next prime is 30220120100081. The reversal of 30220120100021 is 12000102102203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16919146397521 + 13300973702500 = 4113289^2 + 3647050^2 .

It is a cyclic number.

It is not a de Polignac number, because 30220120100021 - 2²² = 30220115905717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30220120099969 and 30220120100005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30220120100081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15110060050010 + 15110060050011.

It is an arithmetic number, because the mean of its divisors is an integer number (15110060050011).

Almost surely, 2^{30220120100021} is an apocalyptic number.

It is an amenable number.

30220120100021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30220120100021 is an equidigital number, since it uses as much as digits as its factorization.

30220120100021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 30220120100021 its reverse (12000102102203), we get a palindrome (42220222202224).

The spelling of 30220120100021 in words is "thirty trillion, two hundred twenty billion, one hundred twenty million, one hundred thousand, twenty-one".