981122113 has 4 divisors (see below), whose sum is σ = 1014953940. Its totient is φ = 947290288.

The previous prime is 981122111. The next prime is 981122119. The reversal of 981122113 is 311221189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311221189 = 631 ⋅493219.

It can be written as a sum of positive squares in 2 ways, for example, as 642267649 + 338854464 = 25343^2 + 18408^2 .

It is a cyclic number.

It is not a de Polignac number, because 981122113 - 2¹ = 981122111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981122111) 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, 16915870 + ... + 16915927.

It is an arithmetic number, because the mean of its divisors is an integer number (253738485).

Almost surely, 2^981122113 is an apocalyptic number.

It is an amenable number.

981122113 is a deficient number, since it is larger than the sum of its proper divisors (33831827).

981122113 is a wasteful number, since it uses less digits than its factorization.

981122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33831826.

The product of its digits is 864, while the sum is 28.

The square root of 981122113 is about 31322.8688500910. The cubic root of 981122113 is about 993.6673532364.

It can be divided in two parts, 98 and 1122113, that added together give a palindrome (1122211).

The spelling of 981122113 in words is "nine hundred eighty-one million, one hundred twenty-two thousand, one hundred thirteen".