31421221103503 has 32 divisors (see below), whose sum is σ = 39517753305600. Its totient is φ = 24270210384000.

The previous prime is 31421221103407. The next prime is 31421221103561. The reversal of 31421221103503 is 30530112212413.

It is not a de Polignac number, because 31421221103503 - 2⁴¹ = 29222197847951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421221103803) 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, 2844333 + ... + 8422153.

It is an arithmetic number, because the mean of its divisors is an integer number (1234929790800).

Almost surely, 2^{31421221103503} is an apocalyptic number.

31421221103503 is a deficient number, since it is larger than the sum of its proper divisors (8096532202097).

31421221103503 is a wasteful number, since it uses less digits than its factorization.

31421221103503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5578479.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 31421221103503 its reverse (30530112212413), we get a palindrome (61951333315916).

The spelling of 31421221103503 in words is "thirty-one trillion, four hundred twenty-one billion, two hundred twenty-one million, one hundred three thousand, five hundred three".