55212121310947 has 2 divisors, whose sum is σ = 55212121310948. Its totient is φ = 55212121310946.

The previous prime is 55212121310921. The next prime is 55212121310953. The reversal of 55212121310947 is 74901312121255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55212121310947 is a prime.

It is not a weakly prime, because it can be changed into another prime (55212121310977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27606060655473 + 27606060655474.

It is an arithmetic number, because the mean of its divisors is an integer number (27606060655474).

Almost surely, 2^{55212121310947} is an apocalyptic number.

55212121310947 is a deficient number, since it is larger than the sum of its proper divisors (1).

55212121310947 is an equidigital number, since it uses as much as digits as its factorization.

55212121310947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 55212121310947 in words is "fifty-five trillion, two hundred twelve billion, one hundred twenty-one million, three hundred ten thousand, nine hundred forty-seven".