201001001238 has 48 divisors (see below), whose sum is σ = 436281797952. Its totient is φ = 66880512000.

The previous prime is 201001001237. The next prime is 201001001269. The reversal of 201001001238 is 832100100102.

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

It is a self number, because there is not a number n which added to its sum of digits gives 201001001238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001001237) 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, 26164758 + ... + 26172438.

It is an arithmetic number, because the mean of its divisors is an integer number (9089204124).

Almost surely, 2^201001001238 is an apocalyptic number.

201001001238 is an abundant number, since it is smaller than the sum of its proper divisors (235280796714).

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

201001001238 is a wasteful number, since it uses less digits than its factorization.

201001001238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101 (or 10098 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The spelling of 201001001238 in words is "two hundred one billion, one million, one thousand, two hundred thirty-eight".