21312141402 has 16 divisors (see below), whose sum is σ = 42801149952. Its totient is φ = 7074569280.

The previous prime is 21312141329. The next prime is 21312141413. The reversal of 21312141402 is 20414121312.

It is a super-2 number, since 2×21312141402² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7367898 + ... + 7370789.

It is an arithmetic number, because the mean of its divisors is an integer number (2675071872).

Almost surely, 2^21312141402 is an apocalyptic number.

21312141402 is an abundant number, since it is smaller than the sum of its proper divisors (21489008550).

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

21312141402 is a wasteful number, since it uses less digits than its factorization.

21312141402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14738933.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21312141402 its reverse (20414121312), we get a palindrome (41726262714).

The spelling of 21312141402 in words is "twenty-one billion, three hundred twelve million, one hundred forty-one thousand, four hundred two".