21503032101431 has 16 divisors (see below), whose sum is σ = 21609163488000. Its totient is φ = 21397048041600.

The previous prime is 21503032101377. The next prime is 21503032101433. The reversal of 21503032101431 is 13410123030512.

It is a cyclic number.

It is not a de Polignac number, because 21503032101431 - 2⁶ = 21503032101367 is a prime.

It is a super-2 number, since 2×21503032101431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21503032101431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21503032101433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2282937440 + ... + 2282946858.

It is an arithmetic number, because the mean of its divisors is an integer number (1350572718000).

Almost surely, 2^{21503032101431} is an apocalyptic number.

21503032101431 is a deficient number, since it is larger than the sum of its proper divisors (106131386569).

21503032101431 is a wasteful number, since it uses less digits than its factorization.

21503032101431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16070.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 21503032101431 its reverse (13410123030512), we get a palindrome (34913155131943).

The spelling of 21503032101431 in words is "twenty-one trillion, five hundred three billion, thirty-two million, one hundred one thousand, four hundred thirty-one".