109212681850 has 24 divisors (see below), whose sum is σ = 203145561468. Its totient is φ = 43682928000.

The previous prime is 109212681841. The next prime is 109212681857. The reversal of 109212681850 is 58186212901.

It can be written as a sum of positive squares in 6 ways, for example, as 58780547809 + 50432134041 = 242447^2 + 224571^2 .

It is a junction number, because it is equal to n+sod(n) for n = 109212681797 and 109212681806.

It is not an unprimeable number, because it can be changed into a prime (109212681857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1326900 + ... + 1406800.

Almost surely, 2^109212681850 is an apocalyptic number.

109212681850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109212681850 is a deficient number, since it is larger than the sum of its proper divisors (93932879618).

109212681850 is a wasteful number, since it uses less digits than its factorization.

109212681850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107250 (or 107245 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 43.

The spelling of 109212681850 in words is "one hundred nine billion, two hundred twelve million, six hundred eighty-one thousand, eight hundred fifty".