10111001381 has 16 divisors (see below), whose sum is σ = 11324691840. Its totient is φ = 8966704320.

The previous prime is 10111001377. The next prime is 10111001399. The reversal of 10111001381 is 18310011101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10111001381 - 2² = 10111001377 is a prime.

It is a super-2 number, since 2×10111001381² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111001321) 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, 114161 + ... + 182358.

It is an arithmetic number, because the mean of its divisors is an integer number (707793240).

Almost surely, 2^10111001381 is an apocalyptic number.

It is an amenable number.

10111001381 is a deficient number, since it is larger than the sum of its proper divisors (1213690459).

10111001381 is a wasteful number, since it uses less digits than its factorization.

10111001381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296636.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 10111001381 its reverse (18310011101), we get a palindrome (28421012482).

The spelling of 10111001381 in words is "ten billion, one hundred eleven million, one thousand, three hundred eighty-one".