29091121 has 4 divisors (see below), whose sum is σ = 29119552. Its totient is φ = 29062692.

The previous prime is 29091103. The next prime is 29091137. The reversal of 29091121 is 12119092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29091121 - 2¹⁹ = 28566833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29091221) 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, 12621 + ... + 14746.

It is an arithmetic number, because the mean of its divisors is an integer number (7279888).

Almost surely, 2^29091121 is an apocalyptic number.

It is an amenable number.

29091121 is a deficient number, since it is larger than the sum of its proper divisors (28431).

29091121 is a wasteful number, since it uses less digits than its factorization.

29091121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28430.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 29091121 is about 5393.6185441687. The cubic root of 29091121 is about 307.5531307053.

The spelling of 29091121 in words is "twenty-nine million, ninety-one thousand, one hundred twenty-one".