154222131244221 has 80 divisors (see below), whose sum is σ = 238297053316608. Its totient is φ = 99295669324800.

The previous prime is 154222131244163. The next prime is 154222131244229. The reversal of 154222131244221 is 122442131222451.

154222131244221 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 2 + 213 + 12 + 4 + 422 + 1 = 666.

154222131244221 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 154222131244221 - 2¹⁰ = 154222131243197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154222131244229) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5816836261 + ... + 5816862773.

Almost surely, 2^{154222131244221} is an apocalyptic number.

It is an amenable number.

154222131244221 is a deficient number, since it is larger than the sum of its proper divisors (84074922072387).

154222131244221 is a wasteful number, since it uses less digits than its factorization.

154222131244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31184 (or 31175 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

Adding to 154222131244221 its reverse (122442131222451), we get a palindrome (276664262466672).

The spelling of 154222131244221 in words is "one hundred fifty-four trillion, two hundred twenty-two billion, one hundred thirty-one million, two hundred forty-four thousand, two hundred twenty-one".