21412312002 has 36 divisors (see below), whose sum is σ = 47938216950. Its totient is φ = 6907191840.

The previous prime is 21412311941. The next prime is 21412312003. The reversal of 21412312002 is 20021321412.

It is a happy number.

21412312002 is a `hidden beast` number, since 21 + 412 + 31 + 200 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21400471521 + 11840481 = 146289^2 + 3441^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21412312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 601627 + ... + 636222.

Almost surely, 2^21412312002 is an apocalyptic number.

21412312002 is an abundant number, since it is smaller than the sum of its proper divisors (26525904948).

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

21412312002 is a wasteful number, since it uses less digits than its factorization.

21412312002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237919 (or 1237885 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21412312002 its reverse (20021321412), we get a palindrome (41433633414).

The spelling of 21412312002 in words is "twenty-one billion, four hundred twelve million, three hundred twelve thousand, two".