31011243042121 has 8 divisors (see below), whose sum is σ = 32559411121920. Its totient is φ = 29494995953808.

The previous prime is 31011243042067. The next prime is 31011243042133. The reversal of 31011243042121 is 12124034211013.

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 31011243042121 - 2²⁹ = 31010706171209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011243082121) 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, 7980245881 + ... + 7980249766.

It is an arithmetic number, because the mean of its divisors is an integer number (4069926390240).

Almost surely, 2^{31011243042121} is an apocalyptic number.

It is an amenable number.

31011243042121 is a deficient number, since it is larger than the sum of its proper divisors (1548168079799).

31011243042121 is a wasteful number, since it uses less digits than its factorization.

31011243042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15960495743.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 31011243042121 its reverse (12124034211013), we get a palindrome (43135277253134).

The spelling of 31011243042121 in words is "thirty-one trillion, eleven billion, two hundred forty-three million, forty-two thousand, one hundred twenty-one".