21113143402 has 64 divisors (see below), whose sum is σ = 35675136000. Its totient is φ = 9305461440.

The previous prime is 21113143393. The next prime is 21113143409. The reversal of 21113143402 is 20434131112.

It is a super-2 number, since 2×21113143402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21113143409) 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, 22294293 + ... + 22295239.

It is an arithmetic number, because the mean of its divisors is an integer number (557424000).

Almost surely, 2^21113143402 is an apocalyptic number.

21113143402 is a deficient number, since it is larger than the sum of its proper divisors (14561992598).

21113143402 is a wasteful number, since it uses less digits than its factorization.

21113143402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21113143402 its reverse (20434131112), we get a palindrome (41547274514).

The spelling of 21113143402 in words is "twenty-one billion, one hundred thirteen million, one hundred forty-three thousand, four hundred two".