31023030032121 has 4 divisors (see below), whose sum is σ = 41364040042832. Its totient is φ = 20682020021412.

The previous prime is 31023030032117. The next prime is 31023030032131. The reversal of 31023030032121 is 12123003032013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31023030032121 - 2² = 31023030032117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023030032131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5170505005351 + ... + 5170505005356.

It is an arithmetic number, because the mean of its divisors is an integer number (10341010010708).

Almost surely, 2^{31023030032121} is an apocalyptic number.

It is an amenable number.

31023030032121 is a deficient number, since it is larger than the sum of its proper divisors (10341010010711).

31023030032121 is a wasteful number, since it uses less digits than its factorization.

31023030032121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10341010010710.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31023030032121 its reverse (12123003032013), we get a palindrome (43146033064134).

The spelling of 31023030032121 in words is "thirty-one trillion, twenty-three billion, thirty million, thirty-two thousand, one hundred twenty-one".