21403151124031 has 2 divisors, whose sum is σ = 21403151124032. Its totient is φ = 21403151124030.

The previous prime is 21403151124029. The next prime is 21403151124049. The reversal of 21403151124031 is 13042115130412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21403151124031 - 2¹ = 21403151124029 is a prime.

It is a super-2 number, since 2×21403151124031² (a number of 27 digits) contains 22 as substring.

Together with 21403151124029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21403151124011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701575562015 + 10701575562016.

It is an arithmetic number, because the mean of its divisors is an integer number (10701575562016).

Almost surely, 2^{21403151124031} is an apocalyptic number.

21403151124031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403151124031 is an equidigital number, since it uses as much as digits as its factorization.

21403151124031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21403151124031 its reverse (13042115130412), we get a palindrome (34445266254443).

The spelling of 21403151124031 in words is "twenty-one trillion, four hundred three billion, one hundred fifty-one million, one hundred twenty-four thousand, thirty-one".