31403121422021 has 8 divisors (see below), whose sum is σ = 32176658165400. Its totient is φ = 30629946914560.

The previous prime is 31403121421963. The next prime is 31403121422041. The reversal of 31403121422021 is 12022412130413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1438773861121 + 29964347560900 = 1199489^2 + 5473970^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31403121422021 - 2¹⁴ = 31403121405637 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 (31403121422041) 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, 90383456 + ... + 90730233.

It is an arithmetic number, because the mean of its divisors is an integer number (4022082270675).

Almost surely, 2^{31403121422021} is an apocalyptic number.

It is an amenable number.

31403121422021 is a deficient number, since it is larger than the sum of its proper divisors (773536743379).

31403121422021 is a wasteful number, since it uses less digits than its factorization.

31403121422021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181117959.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 31403121422021 its reverse (12022412130413), we get a palindrome (43425533552434).

The spelling of 31403121422021 in words is "thirty-one trillion, four hundred three billion, one hundred twenty-one million, four hundred twenty-two thousand, twenty-one".