655010121 has 16 divisors (see below), whose sum is σ = 880782336. Its totient is φ = 432968976.

The previous prime is 655010101. The next prime is 655010159. The reversal of 655010121 is 121010556.

It is not a de Polignac number, because 655010121 - 2¹¹ = 655008073 is a prime.

It is a super-2 number, since 2×655010121² = 858076517224869282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655010101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244636 + ... + 247298.

It is an arithmetic number, because the mean of its divisors is an integer number (55048896).

Almost surely, 2^655010121 is an apocalyptic number.

It is an amenable number.

655010121 is a deficient number, since it is larger than the sum of its proper divisors (225772215).

655010121 is a wasteful number, since it uses less digits than its factorization.

655010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3332.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 655010121 is about 25593.1655134725. The cubic root of 655010121 is about 868.4590333421.

Adding to 655010121 its reverse (121010556), we get a palindrome (776020677).

The spelling of 655010121 in words is "six hundred fifty-five million, ten thousand, one hundred twenty-one".