1380121511 has 2 divisors, whose sum is σ = 1380121512. Its totient is φ = 1380121510.

The previous prime is 1380121499. The next prime is 1380121517. The reversal of 1380121511 is 1151210831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1380121511 - 2¹⁰ = 1380120487 is a prime.

It is a super-3 number, since 3×1380121511³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1380121517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690060755 + 690060756.

It is an arithmetic number, because the mean of its divisors is an integer number (690060756).

Almost surely, 2^1380121511 is an apocalyptic number.

1380121511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380121511 is an equidigital number, since it uses as much as digits as its factorization.

1380121511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 1380121511 is about 37149.9866890959. The cubic root of 1380121511 is about 1113.3689575196.

The spelling of 1380121511 in words is "one billion, three hundred eighty million, one hundred twenty-one thousand, five hundred eleven".