1212001002 has 64 divisors (see below), whose sum is σ = 2796393600. Its totient is φ = 388644480.

The previous prime is 1212001001. The next prime is 1212001003. The reversal of 1212001002 is 2001002121.

It is an interprime number because it is at equal distance from previous prime (1212001001) and next prime (1212001003).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1212001001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479502 + ... + 482022.

It is an arithmetic number, because the mean of its divisors is an integer number (43693650).

Almost surely, 2^1212001002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212001002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398196800).

1212001002 is an abundant number, since it is smaller than the sum of its proper divisors (1584392598).

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

1212001002 is a wasteful number, since it uses less digits than its factorization.

1212001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868 (or 2862 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1212001002 is about 34813.8047619044. The cubic root of 1212001002 is about 1066.1893160756.

Adding to 1212001002 its reverse (2001002121), we get a palindrome (3213003123).

It can be divided in two parts, 121 and 2001002, that multiplied together give a palindrome (242121242).

The spelling of 1212001002 in words is "one billion, two hundred twelve million, one thousand, two".