154022502122221 has 8 divisors (see below), whose sum is σ = 154520596144064. Its totient is φ = 153524446377120.

The previous prime is 154022502122213. The next prime is 154022502122231. The reversal of 154022502122221 is 122221205220451.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 154022502122221 - 2³ = 154022502122213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154022502122201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1497345 + ... + 17614966.

It is an arithmetic number, because the mean of its divisors is an integer number (19315074518008).

Almost surely, 2^{154022502122221} is an apocalyptic number.

It is an amenable number.

154022502122221 is a deficient number, since it is larger than the sum of its proper divisors (498094021843).

154022502122221 is a wasteful number, since it uses less digits than its factorization.

154022502122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19138371.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 154022502122221 its reverse (122221205220451), we get a palindrome (276243707342672).

The spelling of 154022502122221 in words is "one hundred fifty-four trillion, twenty-two billion, five hundred two million, one hundred twenty-two thousand, two hundred twenty-one".