1101121291 has 4 divisors (see below), whose sum is σ = 1112023584. Its totient is φ = 1090219000.

The previous prime is 1101121279. The next prime is 1101121337. The reversal of 1101121291 is 1921211011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1921211011 = 19 ⋅101116369.

It is a cyclic number.

It is not a de Polignac number, because 1101121291 - 2²¹ = 1099024139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5450995 + ... + 5451196.

It is an arithmetic number, because the mean of its divisors is an integer number (278005896).

Almost surely, 2^1101121291 is an apocalyptic number.

1101121291 is a deficient number, since it is larger than the sum of its proper divisors (10902293).

1101121291 is a wasteful number, since it uses less digits than its factorization.

1101121291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10902292.

The product of its (nonzero) digits is 36, while the sum is 19.

The square root of 1101121291 is about 33183.1476957808. The cubic root of 1101121291 is about 1032.6307497984.

The spelling of 1101121291 in words is "one billion, one hundred one million, one hundred twenty-one thousand, two hundred ninety-one".