1380121421 has 16 divisors (see below), whose sum is σ = 1708907904. Its totient is φ = 1087478784.

The previous prime is 1380121403. The next prime is 1380121499. The reversal of 1380121421 is 1241210831.

It is not a de Polignac number, because 1380121421 - 2⁶ = 1380121357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380121121) 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, 129740 + ... + 139973.

It is an arithmetic number, because the mean of its divisors is an integer number (106806744).

Almost surely, 2^1380121421 is an apocalyptic number.

It is an amenable number.

1380121421 is a deficient number, since it is larger than the sum of its proper divisors (328786483).

1380121421 is a wasteful number, since it uses less digits than its factorization.

1380121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269780.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1380121421 is about 37149.9854777899. The cubic root of 1380121421 is about 1113.3689333181.

The spelling of 1380121421 in words is "one billion, three hundred eighty million, one hundred twenty-one thousand, four hundred twenty-one".