31420421240203 has 4 divisors (see below), whose sum is σ = 31420568988360. Its totient is φ = 31420273492048.

The previous prime is 31420421240161. The next prime is 31420421240227. The reversal of 31420421240203 is 30204212402413.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31420421240203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31420421240603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73554625 + ... + 73980562.

It is an arithmetic number, because the mean of its divisors is an integer number (7855142247090).

Almost surely, 2^{31420421240203} is an apocalyptic number.

31420421240203 is a deficient number, since it is larger than the sum of its proper divisors (147748157).

31420421240203 is a wasteful number, since it uses less digits than its factorization.

31420421240203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147748156.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31420421240203 its reverse (30204212402413), we get a palindrome (61624633642616).

The spelling of 31420421240203 in words is "thirty-one trillion, four hundred twenty billion, four hundred twenty-one million, two hundred forty thousand, two hundred three".