21402010113431 has 8 divisors (see below), whose sum is σ = 22451841597600. Its totient is φ = 20372967371680.

The previous prime is 21402010113427. The next prime is 21402010113437. The reversal of 21402010113431 is 13431101020412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21402010113431 - 2² = 21402010113427 is a prime.

It is a super-2 number, since 2×21402010113431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21402010113397 and 21402010113406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402010113437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5197183496 + ... + 5197187613.

It is an arithmetic number, because the mean of its divisors is an integer number (2806480199700).

Almost surely, 2^{21402010113431} is an apocalyptic number.

21402010113431 is a deficient number, since it is larger than the sum of its proper divisors (1049831484169).

21402010113431 is a wasteful number, since it uses less digits than its factorization.

21402010113431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394371209.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21402010113431 its reverse (13431101020412), we get a palindrome (34833111133843).

The spelling of 21402010113431 in words is "twenty-one trillion, four hundred two billion, ten million, one hundred thirteen thousand, four hundred thirty-one".