654121720101 has 16 divisors (see below), whose sum is σ = 910101348864. Its totient is φ = 417112408944.

The previous prime is 654121720099. The next prime is 654121720117. The reversal of 654121720101 is 101027121456.

It is not a de Polignac number, because 654121720101 - 2¹ = 654121720099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654121720121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5627170 + ... + 5742236.

It is an arithmetic number, because the mean of its divisors is an integer number (56881334304).

Almost surely, 2^654121720101 is an apocalyptic number.

It is an amenable number.

654121720101 is a deficient number, since it is larger than the sum of its proper divisors (255979628763).

654121720101 is a wasteful number, since it uses less digits than its factorization.

654121720101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197480.

The product of its (nonzero) digits is 3360, while the sum is 30.

Adding to 654121720101 its reverse (101027121456), we get a palindrome (755148841557).

The spelling of 654121720101 in words is "six hundred fifty-four billion, one hundred twenty-one million, seven hundred twenty thousand, one hundred one".