381111111101012 has 12 divisors (see below), whose sum is σ = 668141831224980. Its totient is φ = 190213445036736.

The previous prime is 381111111100987. The next prime is 381111111101081. The reversal of 381111111101012 is 210101111111183.

It can be written as a sum of positive squares in 2 ways, for example, as 154854280850116 + 226256830250896 = 12444046^2 + 15041836^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85527625937 + ... + 85527630392.

It is an arithmetic number, because the mean of its divisors is an integer number (55678485935415).

Almost surely, 2^{381111111101012} is an apocalyptic number.

It is an amenable number.

381111111101012 is a deficient number, since it is larger than the sum of its proper divisors (287030720123968).

381111111101012 is a wasteful number, since it uses less digits than its factorization.

381111111101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171055256890 (or 171055256888 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 23.

Adding to 381111111101012 its reverse (210101111111183), we get a palindrome (591212222212195).

The spelling of 381111111101012 in words is "three hundred eighty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, twelve".