31401142132221 has 24 divisors (see below), whose sum is σ = 47419753582656. Its totient is φ = 19985630005440.

The previous prime is 31401142132169. The next prime is 31401142132231. The reversal of 31401142132221 is 12223124110413.

31401142132221 is a `hidden beast` number, since 3 + 1 + 4 + 0 + 11 + 421 + 3 + 2 + 221 = 666.

It is not a de Polignac number, because 31401142132221 - 2¹³ = 31401142124029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401142132231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144916920 + ... + 145133441.

It is an arithmetic number, because the mean of its divisors is an integer number (1975823065944).

Almost surely, 2^{31401142132221} is an apocalyptic number.

It is an amenable number.

31401142132221 is a deficient number, since it is larger than the sum of its proper divisors (16018611450435).

31401142132221 is a wasteful number, since it uses less digits than its factorization.

31401142132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290050913 (or 290050910 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 31401142132221 its reverse (12223124110413), we get a palindrome (43624266242634).

The spelling of 31401142132221 in words is "thirty-one trillion, four hundred one billion, one hundred forty-two million, one hundred thirty-two thousand, two hundred twenty-one".