55133655226121 has 4 divisors (see below), whose sum is σ = 55178225684292. Its totient is φ = 55089084767952.

The previous prime is 55133655226063. The next prime is 55133655226127. The reversal of 55133655226121 is 12162255633155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25506742176400 + 29626913049721 = 5050420^2 + 5443061^2 .

It is a cyclic number.

It is not a de Polignac number, because 55133655226121 - 2⁴² = 50735608715017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55133655226127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22285227230 + ... + 22285229703.

It is an arithmetic number, because the mean of its divisors is an integer number (13794556421073).

Almost surely, 2^{55133655226121} is an apocalyptic number.

It is an amenable number.

55133655226121 is a deficient number, since it is larger than the sum of its proper divisors (44570458171).

55133655226121 is a wasteful number, since it uses less digits than its factorization.

55133655226121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44570458170.

The product of its digits is 1620000, while the sum is 47.

The spelling of 55133655226121 in words is "fifty-five trillion, one hundred thirty-three billion, six hundred fifty-five million, two hundred twenty-six thousand, one hundred twenty-one".