31401213332142 has 16 divisors (see below), whose sum is σ = 63165446473680. Its totient is φ = 10406567809152.

The previous prime is 31401213332129. The next prime is 31401213332183. The reversal of 31401213332142 is 24123331210413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15125824267 + ... + 15125826342.

It is an arithmetic number, because the mean of its divisors is an integer number (3947840404605).

Almost surely, 2^{31401213332142} is an apocalyptic number.

31401213332142 is an abundant number, since it is smaller than the sum of its proper divisors (31764233141538).

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

31401213332142 is a wasteful number, since it uses less digits than its factorization.

31401213332142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30251650787.

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

Adding to 31401213332142 its reverse (24123331210413), we get a palindrome (55524544542555).

The spelling of 31401213332142 in words is "thirty-one trillion, four hundred one billion, two hundred thirteen million, three hundred thirty-two thousand, one hundred forty-two".