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BaseRepresentation
bin11101100100000011
320011002212
4131210003
512333331
62332335
71013015
oct354403
9204085
10121091
1182a83
125a0ab
1343169
14321b5
1525d2b
hex1d903

121091 has 6 divisors (see below), whose sum is σ = 128940. Its totient is φ = 113696.

The previous prime is 121081. The next prime is 121123. The reversal of 121091 is 190121.

It is not a de Polignac number, because 121091 - 210 = 120067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80 + ... + 498.

It is an arithmetic number, because the mean of its divisors is an integer number (21490).

2121091 is an apocalyptic number.

121091 is a deficient number, since it is larger than the sum of its proper divisors (7849).

121091 is an equidigital number, since it uses as much as digits as its factorization.

121091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 121091 is about 347.9813213378. The cubic root of 121091 is about 49.4732706080.

The spelling of 121091 in words is "one hundred twenty-one thousand, ninety-one".

Divisors: 1 17 289 419 7123 121091