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121269000091 = 373277540543
BaseRepresentation
bin111000011110000110…
…0100001011110011011
3102121000110000111100211
41300330030201132123
53441324331000331
6131413223311551
711522105331061
oct1607414413633
9377013014324
10121269000091
1147480209728
121b6048ab5b7
13b58808a1b5
145c25ab8031
15324b5c08b1
hex1c3c32179b

121269000091 has 4 divisors (see below), whose sum is σ = 124546540672. Its totient is φ = 117991459512.

The previous prime is 121269000019. The next prime is 121269000109. The reversal of 121269000091 is 190000962121.

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 121269000091 - 219 = 121268475803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121269006091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638770235 + ... + 1638770308.

It is an arithmetic number, because the mean of its divisors is an integer number (31136635168).

Almost surely, 2121269000091 is an apocalyptic number.

121269000091 is the 186141-st centered heptagonal number.

121269000091 is a deficient number, since it is larger than the sum of its proper divisors (3277540581).

121269000091 is an equidigital number, since it uses as much as digits as its factorization.

121269000091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3277540580.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 121269000091 in words is "one hundred twenty-one billion, two hundred sixty-nine million, ninety-one", and thus it is an aban number.

Divisors: 1 37 3277540543 121269000091