1320121908 has 48 divisors (see below), whose sum is σ = 3911474560. Its totient is φ = 377177472.

The previous prime is 1320121861. The next prime is 1320121937. The reversal of 1320121908 is 8091210231.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 872341 + ... + 873852.

Almost surely, 2^1320121908 is an apocalyptic number.

1320121908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1320121908 is an abundant number, since it is smaller than the sum of its proper divisors (2591352652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320121908 is a wasteful number, since it uses less digits than its factorization.

1320121908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746213 (or 1746205 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 1320121908 is about 36333.4819140693. The cubic root of 1320121908 is about 1096.9950792347.

The spelling of 1320121908 in words is "one billion, three hundred twenty million, one hundred twenty-one thousand, nine hundred eight".