4001212121004 has 72 divisors (see below), whose sum is σ = 11650073530368. Its totient is φ = 1134201852000.

The previous prime is 4001212121003. The next prime is 4001212121009.

4001212121004 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (4001212121003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62479122 + ... + 62543129.

Almost surely, 2^{4001212121004} is an apocalyptic number.

It is an amenable number.

4001212121004 is an abundant number, since it is smaller than the sum of its proper divisors (7648861409364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4001212121004 is a wasteful number, since it uses less digits than its factorization.

4001212121004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125022395 (or 125022390 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The spelling of 4001212121004 in words is "four trillion, one billion, two hundred twelve million, one hundred twenty-one thousand, four".