55212121311011 has 6 divisors (see below), whose sum is σ = 64226345198580. Its totient is φ = 47324675409396.

The previous prime is 55212121310981. The next prime is 55212121311019. The reversal of 55212121311011 is 11011312121255.

It is not a de Polignac number, because 55212121311011 - 2⁶ = 55212121310947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55212121311019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 563388992921 + ... + 563388993018.

It is an arithmetic number, because the mean of its divisors is an integer number (10704390866430).

Almost surely, 2^{55212121311011} is an apocalyptic number.

55212121311011 is a deficient number, since it is larger than the sum of its proper divisors (9014223887569).

55212121311011 is a wasteful number, since it uses less digits than its factorization.

55212121311011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126777985953 (or 1126777985946 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 26.

Adding to 55212121311011 its reverse (11011312121255), we get a palindrome (66223433432266).

The spelling of 55212121311011 in words is "fifty-five trillion, two hundred twelve billion, one hundred twenty-one million, three hundred eleven thousand, eleven".