4001645141221 has 16 divisors (see below), whose sum is σ = 5008578019200. Its totient is φ = 3112473475008.

The previous prime is 4001645141191. The next prime is 4001645141267. The reversal of 4001645141221 is 1221415461004.

It is not a de Polignac number, because 4001645141221 - 2²⁷ = 4001510923493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001645241221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372656686 + ... + 372667423.

It is an arithmetic number, because the mean of its divisors is an integer number (313036126200).

Almost surely, 2^{4001645141221} is an apocalyptic number.

It is an amenable number.

4001645141221 is a deficient number, since it is larger than the sum of its proper divisors (1006932877979).

4001645141221 is a wasteful number, since it uses less digits than its factorization.

4001645141221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745324188.

The product of its (nonzero) digits is 7680, while the sum is 31.

The spelling of 4001645141221 in words is "four trillion, one billion, six hundred forty-five million, one hundred forty-one thousand, two hundred twenty-one".