31203133121442 has 16 divisors (see below), whose sum is σ = 63012152324160. Its totient is φ = 10300063360272.

The previous prime is 31203133121417. The next prime is 31203133121443. The reversal of 31203133121442 is 24412133130213.

It is not an unprimeable number, because it can be changed into a prime (31203133121443) 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, 25245252717 + ... + 25245253952.

It is an arithmetic number, because the mean of its divisors is an integer number (3938259520260).

Almost surely, 2^{31203133121442} is an apocalyptic number.

31203133121442 is an abundant number, since it is smaller than the sum of its proper divisors (31809019202718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31203133121442 is a wasteful number, since it uses less digits than its factorization.

31203133121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50490506777.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 31203133121442 its reverse (24412133130213), we get a palindrome (55615266251655).

The spelling of 31203133121442 in words is "thirty-one trillion, two hundred three billion, one hundred thirty-three million, one hundred twenty-one thousand, four hundred forty-two".