1212100002 has 24 divisors (see below), whose sum is σ = 2659463040. Its totient is φ = 398918520.

The previous prime is 1212099991. The next prime is 1212100009. The reversal of 1212100002 is 2000012121.

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 (1212100009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424774 + ... + 427617.

It is an arithmetic number, because the mean of its divisors is an integer number (110810960).

Almost surely, 2^1212100002 is an apocalyptic number.

1212100002 is an abundant number, since it is smaller than the sum of its proper divisors (1447363038).

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

1212100002 is a wasteful number, since it uses less digits than its factorization.

1212100002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852478 (or 852475 counting only the distinct ones).

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

The square root of 1212100002 is about 34815.2265826319. The cubic root of 1212100002 is about 1066.2183451683.

Adding to 1212100002 its reverse (2000012121), we get a palindrome (3212112123).

The spelling of 1212100002 in words is "one billion, two hundred twelve million, one hundred thousand, two".