31421030444111 has 32 divisors (see below), whose sum is σ = 39229846069248. Its totient is φ = 24449210483040.

The previous prime is 31421030444107. The next prime is 31421030444123. The reversal of 31421030444111 is 11144403012413.

It is a happy number.

It is not a de Polignac number, because 31421030444111 - 2² = 31421030444107 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 (31421030444101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155184806 + ... + 155387148.

It is an arithmetic number, because the mean of its divisors is an integer number (1225932689664).

Almost surely, 2^{31421030444111} is an apocalyptic number.

31421030444111 is a deficient number, since it is larger than the sum of its proper divisors (7808815625137).

31421030444111 is a wasteful number, since it uses less digits than its factorization.

31421030444111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205211.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 31421030444111 its reverse (11144403012413), we get a palindrome (42565433456524).

The spelling of 31421030444111 in words is "thirty-one trillion, four hundred twenty-one billion, thirty million, four hundred forty-four thousand, one hundred eleven".