201001002 has 16 divisors (see below), whose sum is σ = 419480640. Its totient is φ = 64087232.

The previous prime is 201000997. The next prime is 201001007. The reversal of 201001002 is 200100102.

It is a happy number.

201001002 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (201000997) and next prime (201001007).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is not an unprimeable number, because it can be changed into a prime (201001007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728127 + ... + 728402.

It is an arithmetic number, because the mean of its divisors is an integer number (26217540).

Almost surely, 2^201001002 is an apocalyptic number.

201001002 is an abundant number, since it is smaller than the sum of its proper divisors (218479638).

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

201001002 is a wasteful number, since it uses less digits than its factorization.

201001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456557.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 201001002 is about 14177.4822165291. The cubic root of 201001002 is about 585.7775736435. Note that the first 3 decimals are identical.

Adding to 201001002 its reverse (200100102), we get a palindrome (401101104).

It can be divided in two parts, 20100100 and 2, that added together give a palindrome (20100102).

The spelling of 201001002 in words is "two hundred one million, one thousand, two".