1031121123213 has 16 divisors (see below), whose sum is σ = 1398974506560. Its totient is φ = 675354980736.

The previous prime is 1031121123199. The next prime is 1031121123283. The reversal of 1031121123213 is 3123211211301.

It is not a de Polignac number, because 1031121123213 - 2¹⁶ = 1031121057677 is a prime.

It is a super-3 number, since 3×1031121123213³ (a number of 37 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1031121123213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031121123283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1464570 + ... + 2051147.

It is an arithmetic number, because the mean of its divisors is an integer number (87435906660).

Almost surely, 2^{1031121123213} is an apocalyptic number.

It is an amenable number.

1031121123213 is a deficient number, since it is larger than the sum of its proper divisors (367853383347).

1031121123213 is a wasteful number, since it uses less digits than its factorization.

1031121123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517436.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1031121123213 its reverse (3123211211301), we get a palindrome (4154332334514).

The spelling of 1031121123213 in words is "one trillion, thirty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred thirteen".