1020001002 has 16 divisors (see below), whose sum is σ = 2040383520. Its totient is φ = 339936752.

The previous prime is 1020001001. The next prime is 1020001013. The reversal of 1020001002 is 2001000201.

It is a happy number.

It is a super-3 number, since 3×1020001002³ (a number of 28 digits) contains 333 as substring.

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 (1020001001) 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, 28324 + ... + 53312.

It is an arithmetic number, because the mean of its divisors is an integer number (127523970).

Almost surely, 2^1020001002 is an apocalyptic number.

1020001002 is an abundant number, since it is smaller than the sum of its proper divisors (1020382518).

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

1020001002 is a wasteful number, since it uses less digits than its factorization.

1020001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31797.

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

The square root of 1020001002 is about 31937.4545322573. The cubic root of 1020001002 is about 1006.6230391796.

Adding to 1020001002 its reverse (2001000201), we get a palindrome (3021001203).

The spelling of 1020001002 in words is "one billion, twenty million, one thousand, two".