154211466561121 has 4 divisors (see below), whose sum is σ = 155232734551744. Its totient is φ = 153190198570500.

The previous prime is 154211466561073. The next prime is 154211466561133. The reversal of 154211466561121 is 121165664112451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 154211466561121 - 2³³ = 154202876626529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154211466561151) 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, 510633995085 + ... + 510633995386.

It is an arithmetic number, because the mean of its divisors is an integer number (38808183637936).

Almost surely, 2^{154211466561121} is an apocalyptic number.

It is an amenable number.

154211466561121 is a deficient number, since it is larger than the sum of its proper divisors (1021267990623).

154211466561121 is a wasteful number, since it uses less digits than its factorization.

154211466561121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021267990622.

The product of its digits is 345600, while the sum is 46.

The spelling of 154211466561121 in words is "one hundred fifty-four trillion, two hundred eleven billion, four hundred sixty-six million, five hundred sixty-one thousand, one hundred twenty-one".