55051022021213 has 2 divisors, whose sum is σ = 55051022021214. Its totient is φ = 55051022021212.

The previous prime is 55051022021189. The next prime is 55051022021239. The reversal of 55051022021213 is 31212022015055.

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., 29619304139044 + 25431717882169 = 5442362^2 + 5042987^2 .

It is a cyclic number.

It is not a de Polignac number, because 55051022021213 - 2⁸ = 55051022020957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55051022021113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27525511010606 + 27525511010607.

It is an arithmetic number, because the mean of its divisors is an integer number (27525511010607).

Almost surely, 2^{55051022021213} is an apocalyptic number.

It is an amenable number.

55051022021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

55051022021213 is an equidigital number, since it uses as much as digits as its factorization.

55051022021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 29.

Adding to 55051022021213 its reverse (31212022015055), we get a palindrome (86263044036268).

The spelling of 55051022021213 in words is "fifty-five trillion, fifty-one billion, twenty-two million, twenty-one thousand, two hundred thirteen".