120381821415 has 48 divisors (see below), whose sum is σ = 211107742560. Its totient is φ = 63451745280.

The previous prime is 120381821377. The next prime is 120381821419. The reversal of 120381821415 is 514128183021.

It is a happy number.

120381821415 is a `hidden beast` number, since 1 + 203 + 8 + 18 + 21 + 415 = 666.

It is not a de Polignac number, because 120381821415 - 2¹⁴ = 120381805031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120381821415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120381821419) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10090644 + ... + 10102566.

It is an arithmetic number, because the mean of its divisors is an integer number (4398077970).

Almost surely, 2^120381821415 is an apocalyptic number.

120381821415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120381821415 is a deficient number, since it is larger than the sum of its proper divisors (90725921145).

120381821415 is a wasteful number, since it uses less digits than its factorization.

120381821415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14544 (or 14541 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 120381821415 in words is "one hundred twenty billion, three hundred eighty-one million, eight hundred twenty-one thousand, four hundred fifteen".