4012152340221 has 20 divisors (see below), whose sum is σ = 6013917675612. Its totient is φ = 2665639309248.

The previous prime is 4012152340199. The next prime is 4012152340237. The reversal of 4012152340221 is 1220432512104.

4012152340221 is a `hidden beast` number, since 4 + 0 + 1 + 215 + 23 + 402 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3118208564025 + 893943776196 = 1765845^2 + 945486^2 .

It is not a de Polignac number, because 4012152340221 - 2¹⁰ = 4012152339197 is a prime.

It is a super-2 number, since 2×4012152340221² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4012152340241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84503136 + ... + 84550601.

Almost surely, 2^{4012152340221} is an apocalyptic number.

It is an amenable number.

4012152340221 is a deficient number, since it is larger than the sum of its proper divisors (2001765335391).

4012152340221 is a wasteful number, since it uses less digits than its factorization.

4012152340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169054042 (or 169054033 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 4012152340221 its reverse (1220432512104), we get a palindrome (5232584852325).

The spelling of 4012152340221 in words is "four trillion, twelve billion, one hundred fifty-two million, three hundred forty thousand, two hundred twenty-one".