1102121287 has 4 divisors (see below), whose sum is σ = 1129002336. Its totient is φ = 1075240240.

The previous prime is 1102121281. The next prime is 1102121299. The reversal of 1102121287 is 7821212011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1102121287 - 2⁷ = 1102121159 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 (1102121281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13440463 + ... + 13440544.

It is an arithmetic number, because the mean of its divisors is an integer number (282250584).

Almost surely, 2^1102121287 is an apocalyptic number.

1102121287 is a deficient number, since it is larger than the sum of its proper divisors (26881049).

1102121287 is an equidigital number, since it uses as much as digits as its factorization.

1102121287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26881048.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 1102121287 is about 33198.2121054734. The cubic root of 1102121287 is about 1032.9432537245.

Adding to 1102121287 its reverse (7821212011), we get a palindrome (8923333298).

The spelling of 1102121287 in words is "one billion, one hundred two million, one hundred twenty-one thousand, two hundred eighty-seven".